[
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O", 
                "condition": {
                    "scalar": "Antifluorite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Li2O", 
                "condition": {
                    "scalar": "Antifluorite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "8.0", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "8.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$",
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O", 
                "condition": {
                    "scalar": "Antifluorite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Rb2O", 
                "condition": {
                    "scalar": "Antifluorite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "-  ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "8.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "9.1", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Rh2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Sc2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "7.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Y2O3", 
                "condition": {
                    "scalar": "Corundum", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CaO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "7.0", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CdO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CoO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "FeO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "MgO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "7.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "7.9", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "NiO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SrO", 
                "condition": {
                    "scalar": "Rock salt", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "HfO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SiO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "8.9", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "8.3", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SnO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "TiO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.0", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "ZrO2", 
                "condition": {
                    "scalar": "Rutile", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.3", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaSnO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.0", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaTiO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaZrO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CaTiO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "HgTiO3*", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "KNbO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "ScAlO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "8.7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SrHfO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SrSnO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SrTiO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "SrZrO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "YAlO3", 
                "condition": {
                    "scalar": "Perovskite", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "8.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "8.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2CdO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.3", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2MgO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "7.8", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "8.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2ZnO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "7.1", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2CdO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2MgO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2ZnO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2CdO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2MgO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2ZnO4", 
                "condition": {
                    "scalar": "Spinel", 
                    "name": "Crystal structure"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "dataType": "Experimental", 
                    "property": {
                        "units": "eV", 
                        "scalar": "- ", 
                        "name": "Band gap energy (E$_g^{expt}$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{GW}$)"
                    }, 
                    "method": "GW"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 1"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "AgMnVO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "AlYO3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83028"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2CaO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "172780"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaMn2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10038"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaY2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78483"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3NiO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30662"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CdK2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25004"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CoK3O2*", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73212"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CuScO2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65547"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2SrO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91221"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeHg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26340"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2NaScO6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22503"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Ti2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36097"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "MnSi2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85554"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "NaNbO2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "300244"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni2SiO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40993"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "RbYO2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49651"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "VO", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647627"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Eq 2"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157454"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Rb4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280293"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162251"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202818"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181280"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Na5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69630"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na3O4Rb1Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40217"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1K5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74911"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In4K14O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67961"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56677"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174299"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O4Rb4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412136"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181834"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49624"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62199"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24325"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181091"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27049"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24131"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79101"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56676"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2K1Na9O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62065"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56674"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In4O7Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6321"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1Na5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4117"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1K4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37271"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33649"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14388"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50846"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1K4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412135"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1K1Na4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "48118"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61496"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281601"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2In2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74896"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2In2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20053"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24805"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Na3O4Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33868"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2Na8O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "104"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27047"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1K2Na3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "64671"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2O7Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73551"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O6Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2270"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15511"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2216"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181089"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "380401"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34600"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Na5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62072"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2K6O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2269"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rb2Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24816"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2K2Na4O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62650"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94240"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1In2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202986"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3In2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39267"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29149"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.0", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3O9Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412138"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.0", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170503"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3O9Rb2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19035"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20624"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4In6O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72887"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2K6O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73550"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2K2Na4O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62136"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158598"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1K3Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "63489"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2In2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73937"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153532"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158590"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2In1K1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65337"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41954"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153531"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59161"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40463"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1In1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30339"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic ", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeKNaO3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30910"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Osn", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60619"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeNa2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23781"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K6MgO4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2340"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O4Sr", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16241"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeO2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23783"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "CaO3Sn", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151593"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaGe2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60061"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162252"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "BaGe3K4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100203"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "GeO2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66593"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4O9Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O5Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22029"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sn2Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90847"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4Na2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51106"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8Si1Sn6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156236"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4K2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31969"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27115"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31338"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge8K2O17", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69428"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge6Na4O15Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6323"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59634"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge9Na4O20", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24087"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge9K4O20", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98215"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36652"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60060"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ge3O9Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10384"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2Ge3O10Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30987"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66073"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29204"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "150383"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "150386"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81851"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157770"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O4Rb2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416328"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4O9Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82393"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga4Ge1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202044"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171080"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ge4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28203"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ge4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15674"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28603"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14006"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27114"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180572"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ge7O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200603"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200614"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ge7O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "249322"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14005"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166198"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151585"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151577"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15500"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170519"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O6Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74969"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27431"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170522"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1In2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "52390"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ga2Ge4O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "250124"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23925"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35533"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61092"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ga2Ge2O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1445"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59303"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2Ge2O8Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10151"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60438"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200166"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "44271"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Rb6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al5Na17O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32600"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "644917"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ge2Mg1O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419312"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1458"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160852"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ga2Ge2O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "368"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1086"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O4Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83345"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Na14O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "38063"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86505"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ge1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173459"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9011"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga4O7Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10316"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41415"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170520"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32743"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge1Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80455"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4Ga2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94461"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O4Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ga2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21042"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ge1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182051"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1K3O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166540"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ga2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9276"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2K6O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74968"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ga4O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10351"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170535"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409452"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170502"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K6O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "17064"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170548"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ge1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16258"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca5Ge3O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "403085"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ca1Ga4O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280042"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91221"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ga2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41662"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ga2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51545"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga4O9Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51546"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca5Ga6O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62324"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Rb6Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411662"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Na2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24235"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al3Na7O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26405"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Ba2In1O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33805"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1Na2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84562"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2Mg1O7Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420522"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "96819"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167815"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1Na2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15619"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157769"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156706"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O17Rb10Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240333"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89081"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mg1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83226"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1Na1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411328"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K6O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201163"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca2O9Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260890"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mg1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171786"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170550"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Ge1Na1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62316"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75669"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Na1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183786"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na8O18Si6Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20768"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na8O18Si6Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20804"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O18Si6Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151543"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3In2O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27390"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Rb2Si3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19028"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O9Si2Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80466"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170531"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1K4O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246254"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170478"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ba3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27386"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19027"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ge2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201750"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98710"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170537"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O8Si2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156705"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O9Si3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33943"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Na2O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10217"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ba1Ge2O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1282"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2K4O21Si8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "249479"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O8Si2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34414"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170539"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27535"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O9Si3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245304"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ga2O8Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1444"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ge1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50512"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75668"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1Na1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156702"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Rb2Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78563"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98564"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240437"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95690"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162347"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O23Rb6Si10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "250379"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Si3Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32677"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181464"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O23Rb6Si10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14023"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240462"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24625"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O12Si4Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32678"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27537"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240423"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170505"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82996"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81100"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2Na2O15Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2850"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O8Si2Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173780"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170553"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O1Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79552"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240417"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170508"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Si1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28534"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240449"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240459"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34884"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Si2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171567"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26553"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31201"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87694"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1K2O15Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39553"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181310"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170507"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
                        "scalar": "1.5", 
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "423129"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O4Si1", 
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                    "name": "ICSD #", 
                    "value": "36324"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87716"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4442"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ca2Mg1O8Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422406"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40657"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4O7Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34803"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159568"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "616005"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4O16Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100310"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170501"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170533"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33702"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170500"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159518"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Si3Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32542"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "172737"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75666"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27536"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9Si3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10385"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25632"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mg1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73776"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80378"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88662"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182052"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Na2O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36399"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170486"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na8O18Si7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85551"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Na2O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28016"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba6Na2O15Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62912"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34669"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Ga2O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27387"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6246"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O5Rb1Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92534"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81095"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27533"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28373"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280480"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ca1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67092"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35667"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3K2O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183282"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79404"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Mg1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202286"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mg2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420258"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Si1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413384"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75665"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Mg1O8Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "43078"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151883"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O7Si2Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "261226"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36041"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170540"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182053"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Mg1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81117"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170523"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Mg1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183983"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170549"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27534"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181465"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca6O14Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34354"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2282"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O4Si1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20544"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240442"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240410"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413385"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "168010"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6245"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181466"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Mg1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94145"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Mg1O8Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419862"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Mg1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163287"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1449"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O12Si3Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27385"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Na2O16Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "380480"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81128"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81133"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92750"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170530"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4O16Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20038"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181463"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Ge1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413383"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ca2O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24426"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Si3Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "38271"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al6Ca4O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16177"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4K1Na3O16Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27596"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Si1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59308"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba6O26Si10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100312"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca4K2O21Si8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "249952"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30884"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O8Si2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245730"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181461"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166273"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O10Rb2Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180324"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170529"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22216"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O18Si8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2155"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159955"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73511"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2K2O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180323"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170489"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100313"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1K1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181462"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182877"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1O4Rb1Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4335"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100619"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80067"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10162"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Mg3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182378"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100314"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Mg1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9672"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173921"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1K1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83449"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170510"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1K1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162489"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170527"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171734"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Na1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162531"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171735"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170521"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Mg3O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34408"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153164"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66888"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Na2O16Si4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156656"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75657"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Ba1Na2O16Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156658"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ba1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75427"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181458"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170512"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ba1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21080"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al6Ca5O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1714"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171738"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170490"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ba1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246027"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26466"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173922"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87498"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75738"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170532"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170475"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171741"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75659"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157457"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171740"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca2O7Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24588"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170511"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245898"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56684"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170477"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170545"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170528"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
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                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89708"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "Al1K1O8Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83534"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                    "name": "ICSD #", 
                    "value": "245729"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183701"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                    "method": "Calculated"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170513"
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                    "scalar": "Nonmagnetic", 
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            }, 
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                "doi": "10.1021/acs.jpclett.5b00710"
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                {
                    "property": {
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                {
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                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
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                    "name": "ICSD #", 
                    "value": "170476"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                {
                    "property": {
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                {
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                {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
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                    "name": "ICSD #", 
                    "value": "153886"
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                "condition": {
                    "scalar": "Nonmagnetic", 
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                }, 
                {
                    "property": {
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                {
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                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                {
                    "property": {
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                }, 
                {
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                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                    "method": "Calculated"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
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                    "name": "ICSD #", 
                    "value": "162660"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                {
                    "property": {
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                    "method": "DFT+U"
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                {
                    "property": {
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                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                    "method": "Calculated"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75653"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                    "method": "Calculated"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419757"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170534"
                }, 
                "condition": {
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                    "name": "Magnetic configuration"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
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                }, 
                {
                    "property": {
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                    "name": "ICSD #", 
                    "value": "40530"
                }, 
                "condition": {
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                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                    "name": "ICSD #", 
                    "value": "89700"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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            "measurement": [
                {
                    "property": {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "410596"
                }, 
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                    "scalar": "Nonmagnetic", 
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            }, 
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                "doi": "10.1021/acs.jpclett.5b00710"
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                {
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        }
    }, 
    {
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                    "name": "ICSD #", 
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            }, 
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                {
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        }
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    {
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                    "name": "ICSD #", 
                    "value": "162617"
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                    "scalar": "Nonmagnetic", 
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            }, 
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                {
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                {
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        }
    }, 
    {
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                    "name": "ICSD #", 
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                }, 
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                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                {
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                {
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                {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            }, 
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                {
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                {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "97713"
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                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                {
                    "property": {
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                        "scalar": "4.1", 
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                {
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                {
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                {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
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                }, 
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            }, 
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                {
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                {
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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        }
    }, 
    {
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                    "name": "ICSD #", 
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            }, 
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                {
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                {
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            ]
        }
    }, 
    {
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                {
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                {
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        }
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    {
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                    "name": "ICSD #", 
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            }, 
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    {
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            }, 
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                {
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        }
    }, 
    {
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            }, 
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                    "property": {
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                {
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                {
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                }, 
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    {
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            }, 
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                {
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                {
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                }, 
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    }, 
    {
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                {
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                {
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                }, 
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    }, 
    {
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                {
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                }, 
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    }, 
    {
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                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162624"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65498"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Mg2O18Si5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158748"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170524"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170498"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181274"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O64Si32", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86207"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280742"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62582"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O12Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162441"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162620"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75476"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161831"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181457"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Ca1O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16191"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4O7Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16751"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75651"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O11Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30119"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51702"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92632"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100457"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157528"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "172781"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157186"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40105"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al11Na1O17", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67545"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al22Na2O34", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34905"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161062"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "172780"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au3O2Rb5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91308"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "1.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15115"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409547"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15116"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1Na2O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411460"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409552"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1Na3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62066"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1K1Na2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61226"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au2Ba1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80327"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83386"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au2Ca1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79802"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au2O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80328"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202543"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1Ba4Na1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73189"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24062"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "639125"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15890"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32561"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au2O8Sr5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71965"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Hg1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74848"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40155"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49753"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag6O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10359"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag5Ge1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72317"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cu1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95089"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag6Ba1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9288"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1K3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200086"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49752"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40153"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Na3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16919"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40154"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25744"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37324"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O6Pt3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35407"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1K2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27410"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1Na2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25511"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Hg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26340"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "203080"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O2Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66276"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Ba1Hg2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40835"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1In2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "52389"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na6O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6161"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1O2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95675"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "0.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1In1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55687"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60821"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O6Pt3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35340"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20225"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1119"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Ga1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95665"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69739"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "165068"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Hg1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80717"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu5O4Rb3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35246"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50404"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173983"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1In7Ir1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "417829"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23039"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sn1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "165122"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg6O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69123"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1O1Rb3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79087"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404761"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Hg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416147"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161025"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14159"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cd1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25555"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg2Nb2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22226"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23170"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34603"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181039"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183725"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25617"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na1O2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "38327"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76314"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Ge7O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100080"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36589"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404913"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Rb2Zn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40754"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1K3O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79086"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9456"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O4Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50529"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag11K1O16V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "391344"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O4Zn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62146"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246585"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2K2O6Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65740"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ga2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159739"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1K2O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85006"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6152"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O7Zn6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2496"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1In1O7Zn4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247275"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2517"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33722"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109366"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76641"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1In1O5Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "380305"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163383"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3Ge3O12Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20216"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182359"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr4K2O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166636"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr4O13Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15061"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82152"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170703"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167190"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na1O4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28213"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Cu1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "401454"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O7\nTi1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28217"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "44528"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18120"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Al1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95662"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na1O4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85497"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80594"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Au1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95663"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O8Si2Zn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4339"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O4Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34565"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2K2O7Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88843"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36659"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O4Rb3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78975"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15984"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "249319"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15798"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3O12Sr3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80582"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99808"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1O8V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29075"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O4Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83227"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8Rb1V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50009"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167187"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18117"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3O11Rb1V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "405927"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167191"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21065"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30880"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26998"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160149"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Ge3O12Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280048"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20129"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O4Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69621"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sn2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24193"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O5Sr1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158144"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4138"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3Na6O18Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20475"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1O3Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "251"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4K6Nb6O26", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200146"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9V2Zn4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59109"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ge2O8Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281271"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29450"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Ca1O12V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161369"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sn2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84805"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Na1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151411"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7Si2Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34325"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160148"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cd3O15V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "406782"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge1O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171795"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2O7Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240989"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na2O5Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20116"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rb1V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1488"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O6Pt1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281299"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sn2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163230"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na5O5V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416170"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4137"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K6O7Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67396"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O6Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79705"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rb2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6101"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183666"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82154"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Nb13O33", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24300"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182577"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Na1Nb5O15", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81441"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Nb3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "63203"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr2V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10330"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19025"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Na1Nb5O15", 
                "id": {
                    "name": "ICSD #", 
                    "value": "53267"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Nb3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14099"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166623"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O3Rb1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78753"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na3O7Sc1Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20120"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Hf1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202080"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb5O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170693"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O22Si4Sr4Ti5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98772"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166951"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Nb3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202400"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162216"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O3Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16380"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183855"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O7Si2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166608"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba6Nb8O30Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36081"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21085"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "47177"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8Ti3Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83525"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Nb2O14Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72111"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3O7Sc1Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413432"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O8Si3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20114"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Rb2Si3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19026"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28253"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18305"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O6Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36290"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O7Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409588"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr2V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72200"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Ti1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412273"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Sr2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247476"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba5Nb4O15", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157477"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39320"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sc1V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27947"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O5Rb1Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39594"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O4V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164186"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "418460"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36184"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89769"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9839"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "12131"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca10K1O28V7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404330"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na16O28Ti10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34441"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260425"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Cd1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O9Si2Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20124"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9Si3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36185"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O7Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30262"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153024"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161341"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73636"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82504"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85746"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56116"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60704"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161057"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al12Ca1O27Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91233"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161061"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161790"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O5Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85745"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "151589"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1K6O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62053"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O2Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62054"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15096"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1In1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95671"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1In1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202429"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164290"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15095"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26599"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "6.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180402"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag5O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "165377"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1K2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25004"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2K2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16223"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Hg5O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81605"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Ge1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30859"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Ge2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "38380"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag3Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9627"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Au3O4Rb8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411730"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40159"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40158"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15100"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180400"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25695"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O1Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49758"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag6O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1299"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37325"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag4O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "418314"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158753"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Rb7Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62657"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4O6Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65706"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30971"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15099"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag6O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404355"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49756"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40157"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23531"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1In2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159740"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Hg1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68616"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag18O21Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33907"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62656"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Hg1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83411"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Rh1Sr3Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51136"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3O8Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27103"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3O10Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15060"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Co2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245715"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Cr1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18119"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3O9Rb2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19033"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ga1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95664"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Cr1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18118"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O4Rb2Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93879"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ga1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60846"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1K2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83229"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Na14O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2195"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95674"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Na1O7Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2829"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3In2O11Zn5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73192"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O7Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15034"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3K2O9Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19032"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2K2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15824"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ge2O7Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420550"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3Nb1O9Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10382"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O7Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15033"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2K2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280204"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga2O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81112"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2K2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166635"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2Na1O6V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99742"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55649"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O7Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409745"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2K3Na1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68464"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2K3Na1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74558"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd3Na2O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28416"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25812"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge4Na4O13Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166629"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167189"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30549"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3Na4O12Zr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20189"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156053"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1K2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2828"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Nb2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "168999"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na5Nb1O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24819"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Na4O10Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20185"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2Na2O7Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20402"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59961"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30224"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Nb2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75603"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167192"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74316"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Na1Nb1O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39209"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19005"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Nb2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "169000"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd4K1O12V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "807"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Na1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28120"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Nb2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161923"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2O7Sr2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420521"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Sr1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25556"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Al1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160643"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge2Na1O6Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22503"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge3Hf2Na4O12", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65807"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O4Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83312"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9147"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167193"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K6O7Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67397"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108936"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga4O8Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155638"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Cd3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27384"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O9Zn4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98563"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20556"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9535"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153966"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga5Na1O12Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108816"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "63480"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O12Sr1V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155419"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9534"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1O3Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1999"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9533"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166436"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O12Rb2Sr1V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155421"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7Si1Ti1Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23023"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80938"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14363"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2321"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180731"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166952"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb12O29", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93110"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180732"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Nb4O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180733"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166516"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O4Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73777"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr1V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40312"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62150"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262710"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62151"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Co1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411224"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga5O12Y3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80148"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1860"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mg1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202823"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Mg1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "165102"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1Nb1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100695"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Si1Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167186"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O6Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83427"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O4Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29262"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O7Si2Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88589"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166438"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84884"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3O13V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202426"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O6Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16160"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Nb2O11V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "165097"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166437"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O8V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "414009"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4Nb6O17", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35030"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82153"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262708"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93603"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ca1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80810"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3Nb3O13Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79734"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1O2Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95669"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Na1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28121"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412920"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1Nb1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18187"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ge1O5Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154327"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27971"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Y2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87082"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sr2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20293"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr3Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34629"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246711"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8Sr3V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73258"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O4Si1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20161"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39272"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100799"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36097"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55221"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164386"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246709"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31887"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27969"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O12Si3Zr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20340"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O12Si3Zr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15546"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O5Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4120"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35181"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7Ti3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15463"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O15Si6Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93569"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Nb2O9Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24390"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O12Ti5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170677"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Sr1Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97007"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O6Si2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "168048"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O10Sr4Ti3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34630"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O10Si4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68499"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Na2O14\nSi4Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60411"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O15Rb2Si6Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93568"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O5Si1Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20101"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O11Si4Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16899"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1O12Rb2\nSi4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173279"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O6Si1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83455"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Nb1O8Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419363"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162924"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O26Si8Ti4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166625"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sr1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182763"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93098"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202243"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na4O13Sc2Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200808"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sr1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182248"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O7Si2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24866"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O15Si6Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51313"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153174"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31864"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180956"
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                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O19Ti9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62766"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71915"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sr1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27045"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sr1Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "184455"
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                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Ge1O5Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32744"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O9Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79217"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Nb2O9Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37161"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157775"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153286"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281548"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O13Rb2Ti6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23878"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O8Si2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34453"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O8Si3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409286"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O15Si6Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "46012"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O23Rb4Si8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281064"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O13Ti6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25712"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O7Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86241"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Na1O7Sc1Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166998"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "38212"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O19Si8Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68904"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Mg1Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240277"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167958"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Si2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171255"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41493"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4O30Ti13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "300032"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O12Sc2Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27389"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O13Ti6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23877"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "657748"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162923"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36411"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85008"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16264"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9Rb1Sc1Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166999"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1K1O7Si2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163665"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "200082"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O4Ti1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81538"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O14Si4Sr2Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83362"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba9O24Sc2Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75175"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O13Ti6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2922"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56898"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na2O15Si6Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97289"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O11Ti5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26174"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Si3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90684"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Fe1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83437"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "162369"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202765"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Si2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166310"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O4Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15450"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Si2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245656"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Si2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281612"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41056"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Nb1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24078"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na3O15Si6Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75582"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9Ti4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31783"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb1Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31959"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O21Si6Sr7Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75590"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154035"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O7Si2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20100"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ga1O6Y3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155086"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba6O17Ti4Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "96630"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb1Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1270"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb1Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31960"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al5Na1O12Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15346"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O10Si3Sr1Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167613"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O11Si4Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6267"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27681"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28004"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1Si1Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25731"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "169652"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O7Si2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "203131"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20335"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Sr1Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75272"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O10Si3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240470"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O10Sc2Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "167617"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Rb1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49651"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3O9Si2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79453"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98570"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Sc1Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74553"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33721"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74778"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281313"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Hf1O9Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183835"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1O2Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34958"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sc2Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16214"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O20Sr1Ti11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71299"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164148"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1O2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "49650"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sc2Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75925"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Ti2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160111"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O4Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "184695"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O12Si4Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73801"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28212"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Si1Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69644"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O5Zr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "18301"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O4Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39707"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1O8Zr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29263"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Hf1O9Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79452"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1O3Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27100"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416573"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3O9Y4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87118"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O4Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51183"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sc2Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1457"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Si1Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27003"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647544"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Si1Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153076"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O2Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25729"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O12Zr5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14024"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr3Zr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23731"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29003"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Ti1Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34692"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2740"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al3O12Sc2Y3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67055"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2O9Y4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80041"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf5K4O12", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180186"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97462"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O4Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78483"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59111"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf2K2O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180185"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "16886"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
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                }, 
                {
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                {
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                        "units": "eV", 
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                }, 
                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "74607"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
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                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "89355"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                }, 
                {
                    "property": {
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                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "153818"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "201083"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
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                    "name": "ICSD #", 
                    "value": "29153"
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                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
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                    "method": "Calculated"
                }, 
                {
                    "property": {
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                {
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                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                }
            ]
        }
    }, 
    {
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                    "value": "173398"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                {
                    "property": {
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                        "scalar": "4.1", 
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                    "method": "DFT+U"
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                {
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                {
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                }, 
                {
                    "property": {
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                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
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                "chemicalFormula": "O3Sr1Zr1", 
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                    "name": "ICSD #", 
                    "value": "41083"
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            }, 
            "reference": {
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                    "property": {
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                {
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                    "method": "DFT+U"
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                {
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                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Sr1Zr1", 
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                    "name": "ICSD #", 
                    "value": "89357"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
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                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181828"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "Ca1O3Zr1", 
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                    "name": "ICSD #", 
                    "value": "167889"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
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                {
                    "property": {
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                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                    "name": "ICSD #", 
                    "value": "25701"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
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                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                }, 
                {
                    "property": {
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
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                }, 
                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
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            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Zr1", 
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                    "name": "ICSD #", 
                    "value": "79914"
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
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                {
                    "property": {
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                    "method": "DFT+U"
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                {
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                        "scalar": "2.5", 
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
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            ]
        }
    }, 
    {
        "sample": {
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                    "value": "160218"
                }, 
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
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                    "property": {
                        "units": "eV/atom", 
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                }, 
                {
                    "property": {
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                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
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                        "scalar": "2", 
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                {
                    "property": {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
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                }
            ]
        }
    }, 
    {
        "sample": {
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                    "name": "ICSD #", 
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                "condition": {
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            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
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    {
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            }, 
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                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80050"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O2Pd1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51499"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30443"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3O4Pt2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14158"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O4Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170598"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O2Rb3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95831"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Ir1Na3O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404507"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cu1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93880"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76431"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1K1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4200"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3Rh1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15520"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "2.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24923"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89838"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1K4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "47223"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Cu3O12Pt4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "248230"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1O3Pd2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "248051"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1Na4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67826"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1Na2O4Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74913"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O2Rh1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "261561"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba9O24Rh8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280769"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1K2Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74912"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Na6O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65237"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9206"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Cu2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "87609"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O3Pd1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202812"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Na3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "415348"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "41534"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15098"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Co1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180889"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647369"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ir1O6Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74030"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O2Rb3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65446"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu7Na12O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422749"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Rh1Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109297"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78698"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu4Na7O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422750"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu3Na1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59589"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173278"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25020"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85317"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "415754"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na5O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14180"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262579"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Na7O6Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66006"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu4O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77675"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Na7O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "414127"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89702"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Pd1Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88135"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na4O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10473"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na4O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85632"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O4Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170597"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73216"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Na9O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99917"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2K6O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6153"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Ir1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81904"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O2Rb3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94437"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Fe1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31919"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba15O27Pt6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51105"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2K4O5Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33797"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2O9Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16367"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65977"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2Ni1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73209"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15770"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O6Pt1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72721"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Rh2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647372"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O6Pt1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66347"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni4O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20898"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Fe1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2786"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co4Na10O10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413025"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2O9Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16365"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na2Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79878"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co7K4O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "152439"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Hg6O10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416209"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Na6O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99580"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ca1O6Pd3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73082"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Co1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "261608"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50478"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Na1Ni3O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73160"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2K2Na4O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "64678"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1Ni1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80285"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K3Na1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159909"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co6O11Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "152279"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K9O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174311"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O4Rb5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73191"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K1Na4O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174306"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "184626"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92132"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76670"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76640"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "96085"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co4Na10O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10499"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu1O8Pt1Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62965"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1K1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4199"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Ir1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25500"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Na1Ni3O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59588"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Cu3O12Sn4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "184281"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160204"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160219"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O3Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647650"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
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                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164736"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88022"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92091"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
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                "chemicalFormula": "Hf1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86830"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89383"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161598"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
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                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67004"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
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                {
                    "property": {
                        "units": "eV", 
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                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92096"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
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                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173968"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                }, 
                {
                    "property": {
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                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Hf7O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4136"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Hf4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108957"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "53033"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
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                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173966"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "57385"
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                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
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                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hf1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71354"
                }, 
                "condition": {
                    "scalar": "Nonmagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "7.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ir3O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "54725"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu5Na8O10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "415349"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na5Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1583"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "48180"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2Na1O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246359"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Ca1Ir1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74029"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88720"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "43179"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2Na1O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246361"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69757"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ir1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69720"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O2Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25018"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O6Rh1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51800"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3Pd1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16536"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Rh1Sr3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90285"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na2O3Pt1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25019"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246664"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O8Pt3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65412"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1Na2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "47105"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir1Na1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "405134"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ca1Ir2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246280"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2Ni1O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33530"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O7Rb8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174314"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O7Rb8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154370"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ir1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173850"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O6Pt3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35337"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16295"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2O9Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245254"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21069"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422751"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O4Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109301"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O4Rh2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28954"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Co1O6Rh1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50809"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O2Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66277"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu3Na1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72328"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32756"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe4K14O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67170"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1K3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73212"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.39", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K6O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174312"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ir1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81899"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ir1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36628"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Na3O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73211"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Fe1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31918"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15761"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca4Ir1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280873"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29082"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Mn1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30931"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1O6Sr3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81903"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O6Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154371"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Hg6O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416208"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Na8O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1557"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Hg2O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82243"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Fe1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66546"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Cu1Ir1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73188"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.3", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K6O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6149"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.72", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe5K17O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "415753"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1K2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74940"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50869"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba8Co7O21", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94831"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Mg1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "4202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Co10O17", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240501"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O2Rh1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29214"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "175"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155847"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411019"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "43458"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25754"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "3.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Hg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2224"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "75588"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Co1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92321"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Fe2Ge4O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240618"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56878"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "411020"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84176"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co5O15Sr6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155311"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Cu1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183216"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na3O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171376"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "56702"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ir2Mg1O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245251"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na3O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413270"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O3Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95833"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K2Na1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36380"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Hg1O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416169"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Rb4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154291"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co4O12Sr5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88628"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Cu3Ge4O12", 
                "id": {
                    "name": "ICSD #", 
                    "value": "184279"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Co1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16234"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16834"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu11O26V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201626"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Mn3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "971"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182288"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe6Na14O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1118"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cu1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419201"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Ni2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69508"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co10Ge3O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79717"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe4O11Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91064"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36123"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27310"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "26814"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O4Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89507"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Na4O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1025"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu1Ge2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86844"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co4O7Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95745"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3Ge5K2O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "410828"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1Mg1O6Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77835"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27497"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Fe1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281028"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9362"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "63165"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Ge2O7Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "86843"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca3Co2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82174"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27184"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "180531"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Ga1O7Sr2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71263"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1O6Rh1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51138"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe5Na3O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "14353"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K4O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154372"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Fe1K1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34472"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe18O27", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29062"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe12O19Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69023"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51445"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K6O8Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85404"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94467"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94465"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Ge2Na1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28024"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Mn1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61403"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Ge1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89789"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cr2K1O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62783"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O6Rb6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245999"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39504"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr8O21", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155849"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "29203"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mn1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22245"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co2O5Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171435"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu5K1O13V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "400802"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2O2Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25002"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108896"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23493"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Au1Cr3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155508"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Cu1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16708"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Ba1Cu1O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422132"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Cu1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84378"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Cu1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "59266"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe6O13Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "63621"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30660"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74434"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Cu1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246081"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cr3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155507"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3K2O10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "8175"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Fe6O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10103"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Ge4O13Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99603"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Fe1O8Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23473"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Cr1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "25624"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ge1Mn2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22046"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "643186"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Hg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245275"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu5Na2O14Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "416179"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94080"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.05", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu4K1Mg1\nO13V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67816"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na2O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419587"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O7Rb4Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85405"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.32", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O3Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155837"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2Co1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95439"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33774"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Ni1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31853"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33771"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Mg1O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404852"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Na2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2534"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35459"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67119"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3Fe4O24V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67999"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32524"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Cr1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23492"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe4O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2529"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd18O38V8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "421347"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Mn1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31854"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Ge2Na1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "174433"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33804"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Pt1Sr3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280519"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe1K1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "412877"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Ge2O7Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95935"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3Cu1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155506"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2Na2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "409981"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84970"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O11V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93453"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "261512"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Ga1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35079"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr5O12", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24299"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Mn3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1979"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3V16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77707"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-0.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe4O16Si2Sn7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "407506"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2K1Mg2\nO12V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73194"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201398"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1K3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108934"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420235"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3O8Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82622"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr3K1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246524"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mn2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61038"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76001"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "150462"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O7Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28411"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "35029"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1Na2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72364"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30662"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Nb1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16377"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50645"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu6O18Si6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65955"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3Mn1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "108935"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2Mn3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16957"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171001"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245595"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.78", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3Na2O12Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "169"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn8O16Rb11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420662"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82161"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Na2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159511"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82079"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2Ni4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60102"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171866"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2Ni4O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246598"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O6Sc1Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81659"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.89", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na1O4Rb2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170771"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.82", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mn1Na1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71623"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24493"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20227"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10329"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51319"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280061"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1Mg1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "84737"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ir1O6Sc1Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88152"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "68495"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Ge2O7Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262398"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe2O5Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164176"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn5O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27382"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe5O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77434"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe4O8Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2536"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.23", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1Mn2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24258"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280062"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20905"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3Na2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61050"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.92", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu3O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "418372"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "859"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe4O7Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262841"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55647"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe4O8Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37011"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40993"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36183"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Fe1Ge2O7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22358"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.4", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2769"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2O5Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100090"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74424"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe4O7Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262842"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe5O12Y3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2012"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81046"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O2Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "419244"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O13V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83589"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202376"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "37023"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2Na4O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23345"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu1O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97762"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19046"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Fe1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246244"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V2Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "250002"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62513"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157694"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe2O5Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Ni1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31298"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2338"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9414"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40839"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83741"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62081"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.06", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O5Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90184"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn5O8V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262806"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1K1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245133"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8V3Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "9268"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O7Rb1V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245134"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.37", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Mn1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170136"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co1O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85061"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2O9V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404713"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Cr2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "61612"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "96087"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.28", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157933"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O8Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85055"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K4O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "250388"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.4", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2Ba1Mn1\nO8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "408193"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O8V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80299"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mn2O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10038"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Cr2O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "159409"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na9O35V14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50667"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn4O15Sr7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72332"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O7Sn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163817"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn5O8V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "262807"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.18", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cu2O12Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71535"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157936"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1K4O18V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164865"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2199"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn4O13Sr7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160291"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "92955"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Na1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82856"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95438"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24595"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K2O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79549"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na2O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "905"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33856"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cd1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80811"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2Mn5O21Sr9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "168196"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60580"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10391"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89412"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O6Sr1V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65928"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3O8V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "100782"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Nb1O6Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "181751"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202755"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "1898"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mn2O14\nSi4Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39593"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Nb2O9Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "150434"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O12Sr1V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155420"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Co1Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "150431"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78168"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79865"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Fe1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "203203"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1K1Na1O10\nSi4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260174"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.66", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O6Si2V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163128"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Mn1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "158975"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1O11V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71869"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.56", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O2Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "60847"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O7Rb2V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "417890"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mn1O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "417892"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O11V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "196"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2Na2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20534"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co1O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73778"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Co2O7Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81473"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3Nb2O9Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202666"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O1V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "647627"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.24", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246514"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.55", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15854"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Nb2O8Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202667"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O6Sn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "163815"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Ni1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69381"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg2O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76980"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na2O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "166607"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Nb1O6Sr3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "418494"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Nb2O9Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157044"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.01", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe5Na2O20\nSi6Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15283"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O4V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "76979"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn4Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202550"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.5", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O6Sr2Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164699"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O15V10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413302"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34342"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O18V13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "51472"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O16V13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77708"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153493"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn7O21Si7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90882"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba8O22V7", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78035"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O9V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2556"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79278"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg3O12Si3V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27372"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Fe1O6Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79353"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O7Si2Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "261227"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O15V10", 
                "id": {
                    "name": "ICSD #", 
                    "value": "413301"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6132"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4Sr2V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80601"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr1V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77617"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Mn1Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171479"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77579"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.68", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O18Sr1V13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97949"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.62", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Sr1V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "241179"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O5V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82689"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O7Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "281135"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Cu1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32633"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O7Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40803"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.21", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al1Cu1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95661"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb4O15Sr5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79218"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Fe3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80674"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.7", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe4Mn3O24V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280182"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27287"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O5Sr2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "90183"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.6", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2O5Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24416"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.27", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280359"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "182047"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.11", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "16271"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33881"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba6Mn5O16", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97017"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.53", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn4O7Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36273"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.29", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe4Mg3O24V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157615"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe3Na1O12V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "401202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "21028"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "39196"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.98", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6248"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co4Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "172186"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Mg2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "404851"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.3", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu2Na2O11Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "240930"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O7Sr1V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "33852"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ni2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2358"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1K2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83228"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Na2O8Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "154124"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.57", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O14Rb3V5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "420851"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.42", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mn1O4Rb1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "80640"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "In1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155162"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.17", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2645"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.95", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Cu3O12Sc4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "93522"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V2Zn2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2886"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.16", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Mn1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-1.91", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O10Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40301"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "10156"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "46003"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O6V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40849"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.13", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109250"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.08", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Na1O4Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "36090"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97867"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba4O10Pt1Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27964"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.86", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O10Sr4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81351"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag2O12Sr1V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "161371"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.22", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2Mg3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66672"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg3Mn2O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27374"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247210"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba17O57Pt4\nY16Zn8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "407064"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.93", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O8V2Zn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "23776"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "40922"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81994"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24321"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247211"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "4.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O4Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157934"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1Nb1O3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "201899"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.19", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Mn2O15\nSi4Zn4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "20121"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247215"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O18Rb4V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164866"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.52", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "157935"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.49", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "2357"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O15Sr1V6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "98575"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "74633"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.73", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cd1O4V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "28961"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O7Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "202516"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn2O7Sc2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "83277"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cr1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73892"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cr1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6133"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9V5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66584"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Fe3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "77437"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.41", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ag1Nb3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "67244"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.54", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cu1O2Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65547"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Fe1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183966"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Fe1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "183965"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.2", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Co1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "48107"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1Na1O4V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260949"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.33", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr2O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "64677"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O10Sr1V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "408096"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "422975"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.31", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O8V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82063"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "19013"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.61", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3O12Si3V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27380"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.67", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O8V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "245500"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K3Nb6O19V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82188"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.8", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.2", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O4Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "171896"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.26", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O3Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50694"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2O4Si1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89069"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.46", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O7Rb2V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246368"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88978"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na3Nb1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "6116"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.45", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O9V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "173000"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.71", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1Na1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97255"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "32587"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15899"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca2O7V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "421266"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cu1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71864"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O3Ti1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246516"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.48", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ca1Cu1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72612"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.85", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Na1Nb1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72330"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb2O8Zn3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "66147"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55442"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Nb6O26Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15934"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.12", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "55443"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2O9Sr1V3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "153542"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.64", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O4V2Zn1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "99181"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2In1Nb1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109162"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160600"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba2Cr1Nb1O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81844"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.02", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Cr10O15", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82101"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.35", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7V2Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "160865"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.25", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb8O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "71218"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.69", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mn2O8V2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72295"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.58", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Cr1O5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "73893"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.76", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.3", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "69314"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89641"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K2Nb5O15Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "82147"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.99", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Ni1O5Y2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "72628"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.1", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Nb3O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31994"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O9Rb2V4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79410"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.51", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe2K2Nb4O13", 
                "id": {
                    "name": "ICSD #", 
                    "value": "50038"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.59", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.4", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Nb8O14", 
                "id": {
                    "name": "ICSD #", 
                    "value": "79976"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn3Nb6O11", 
                "id": {
                    "name": "ICSD #", 
                    "value": "62661"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.44", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "34425"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.83", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Nb2O6", 
                "id": {
                    "name": "ICSD #", 
                    "value": "15855"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.63", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O3Sr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "88723"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.7", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg6Mn1O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "24710"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.9", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.1", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.6", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1Mg1O6Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "164174"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.81", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.3", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr2Mg1O4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "97202"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.65", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Na3Nb34O64", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65161"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.75", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.9", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1O7Si2V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "78029"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.03", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O5Si2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85554"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.74", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al2Mn3O12Si3", 
                "id": {
                    "name": "ICSD #", 
                    "value": "94604"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba3Nb2O8", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95193"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.14", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Sr1V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "30451"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.7", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O5Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "65219"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.94", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O7Si2Sr1V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "64766"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.04", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.6", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O6Sr2Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "170684"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.43", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "K1Mn1Na1O10\nSi4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260176"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg1O3V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "284"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.84", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1K1Na1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "260175"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.77", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb6O12Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "280002"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.79", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95579"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "246954"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mn1O4Ti2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "22383"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.88", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.8", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Cr1O3Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "85141"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "155478"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O3V1Y1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "95578"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.34", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.7", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.8", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "O5Sc2V1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "169174"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.38", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.2", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Fe1O3Zr1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "247122"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.87", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Mg4Nb2O9", 
                "id": {
                    "name": "ICSD #", 
                    "value": "91748"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.07", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.6", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.8", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Mn3O38Ti18", 
                "id": {
                    "name": "ICSD #", 
                    "value": "81584"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.15", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "0.8", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "27597"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.97", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.4", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "5.9", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "156832"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.6", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Ba1Fe1O10Si4", 
                "id": {
                    "name": "ICSD #", 
                    "value": "31205"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.96", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.1", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "4.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.5", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Nb1O4Sc1", 
                "id": {
                    "name": "ICSD #", 
                    "value": "109191"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.36", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "2", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.9", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.0", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Al4Mn2O18Si5", 
                "id": {
                    "name": "ICSD #", 
                    "value": "89076"
                }, 
                "condition": {
                    "scalar": "Antiferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-3.09", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.9", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "3.5", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "1.7", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.1", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }, 
    {
        "sample": {
            "material": {
                "chemicalFormula": "Na1Nb1O2", 
                "id": {
                    "name": "ICSD #", 
                    "value": "300244"
                }, 
                "condition": {
                    "scalar": "Ferromagnetic", 
                    "name": "Magnetic configuration"
                }
            }, 
            "reference": {
                "doi": "10.1021/acs.jpclett.5b00710"
            }, 
            "measurement": [
                {
                    "property": {
                        "units": "eV/atom", 
                        "scalar": "-2.47", 
                        "name": "Enthalpy of formation ($\\Delta$H$_f$)"
                    }, 
                    "method": "Calculated"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "1.5", 
                        "name": "Band gap energy (E$_g^{DFT+U}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "units": "eV", 
                        "scalar": "5.1", 
                        "name": "O-2p band center energies (E$_{O2p}$)"
                    }, 
                    "method": "DFT+U"
                }, 
                {
                    "property": {
                        "scalar": "2.2", 
                        "name": "Average atomic electronegativity differences between O and its first-nearest neighbours ($\\Delta$$X$)"
                    }
                }, 
                {
                    "property": {
                        "units": "eV/V$_0$", 
                        "scalar": "6.5", 
                        "name": "Neutral oxygen vacancy formation energies (E$_v$)"
                    }, 
                    "method": "Calculated"
                }
            ]
        }
    }
]