{
    "category": "system.chemical", 
    "references": [
        {
            "url": "http://www.matprop.ru/Diamond_basic.html"
        }
    ], 
    "names": [
        "Diamond"
    ], 
    "properties": [
        {
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            "conditions": [
                {
                    "units": "K", 
                    "scalars": {
                        "value": "300"
                    }, 
                    "name": "Temperature"
                }
            ], 
            "name": "Crystal structure"
        }, 
        {
            "scalars": {
                "value": "O   h   7  -Fd3m"
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            ], 
            "name": "Group of symmetry"
        }, 
        {
            "scalars": {
                "value": "1.764\u00b710   23"
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                    }, 
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            ], 
            "name": "Number of atoms in 1 cm"
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                "value": "1860 K"
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            "name": "Debye temperature"
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                "value": "3.515 g/cm   3"
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                    }, 
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            ], 
            "name": "Density"
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        {
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                "value": "5.7"
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            ], 
            "name": "Dielectric constant (10"
        }, 
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                "value": "1.40   m     o"
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            ], 
            "name": "Effective electron masses"
        }, 
        {
            "scalars": {
                "value": "0.36   m     o"
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            ], 
            "name": "Effective electron masses"
        }, 
        {
            "scalars": {
                "value": "2.12   m     o"
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                    }, 
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            ], 
            "name": "Effective hole masses"
        }, 
        {
            "scalars": {
                "value": "0.70   m     o"
            }, 
            "dataType": "EXPERIMENTAL", 
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            "name": "Effective hole masses"
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                    }, 
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            ], 
            "name": "Effective hole masses split-off"
        }, 
        {
            "scalars": {
                "value": "3.567A"
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            "dataType": "EXPERIMENTAL", 
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            "name": "Lattice constant"
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                "value": "0.16 eV"
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                    "name": "Temperature"
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            ], 
            "name": "Optical phonon energy"
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    ]
}