{
    "category": "system.chemical", 
    "references": [
        {
            "url": "http://www.matprop.ru/AlGaAs_basic.html"
        }
    ], 
    "names": [
        "AlGaAs"
    ], 
    "properties": [
        {
            "scalars": {
                "value": "Zinc Blende"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Crystal structure"
        }, 
        {
            "scalars": {
                "value": "T   d   2  -F43m"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Group of symmetry"
        }, 
        {
            "scalars": {
                "value": "(4.42-0.17x)\u00b710   22"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Number of atoms in 1 cm"
        }, 
        {
            "scalars": {
                "value": "370+54x+22x   2  K"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Debye temperature"
        }, 
        {
            "scalars": {
                "value": "5.32-1.56x g\u00b7cm   -3"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Density"
        }, 
        {
            "scalars": {
                "value": "12.90-2.84x"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Dielectric constant (static)"
        }, 
        {
            "scalars": {
                "value": "10.89-2.73x"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Dielectric constant (high frequency)"
        }, 
        {
            "scalars": {
                "value": "0.063+0.083x   m     o   (x<0.45)"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Effective electron mass"
        }, 
        {
            "scalars": {
                "value": "0.85-0.14x   m     o   (x>0.45)"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Density-of-states electron mass"
        }, 
        {
            "scalars": {
                "value": "0.26   m     o   (x>0.45)"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Conductivity effective mass"
        }, 
        {
            "scalars": {
                "value": "0.51+0.25x   m     o"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Effective hole masses"
        }, 
        {
            "scalars": {
                "value": "0.082+0.068x   m     o"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Effective hole masses"
        }, 
        {
            "scalars": {
                "value": "4.07-1.1x eV (x<0.45)  3.64-0.14x eV (x>0.45)"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Electron affinity"
        }, 
        {
            "scalars": {
                "value": "5.6533+0.0078x A"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Lattice constant"
        }, 
        {
            "scalars": {
                "value": "36.25+1.83x+17.12x   2  -5.11x   3  meV"
            }, 
            "dataType": "EXPERIMENTAL", 
            "units": "", 
            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Optical phonon energy"
        }
    ]
}