A crystalline form of carbon, made of a network of covalent, tetrahedrally bound carbon atoms. In 1797, the English chemist Smithson Tennant proved that diamond is pure carbon.

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Atomic / Molecular Weight 12.011 gmol-1Clip
Density 3520 kgm-3Clip
Melting Point 3830 KClip
Refractive index 2.4175 to 2.4178 at 589.3nm 101.3kPa 0CClip
Mohs Hardness 10 Clip
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See also: Carbon, Carbonado, Graphite.

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Subjects: Chemistry