Graphite is a crystalline allotrope o carbon, a semimetal an a native element mineral. Graphite is the maist stable form o carbon unner staundart conditions. Tharefore, it is uised in thermochemistry as the staundart state for definin the heat o formation o carbon compoonds.
Quick facts General, Category ...
| Graphite |
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 Graphite specimen |
| General |
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| Category | Native mineral |
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Formula
(repeatin unit) | C |
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| Strunz clessification | 1.CB.05a |
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| Creestal seestem | Hexagonal |
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| Creestal cless | Dihexagonal dipyramidal (6mmm)
H-M symbol: (6/m 2/m 2/m) |
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| Space group | P63/mmc |
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| Unit cell | a = 2.461, c = 6.708 [Å]; Z = 4 |
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| Identification |
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| Colour | Iron-black to steel-gray; deep blue in transmitted light |
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| Creestal habit | Tabular, six-sided foliated masses, granular to compacted masses |
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| Twinnin | Present |
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| Cleavage | Basal – perfect on {0001} |
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| Fractur | Flaky, ithergates rouch when nae on cleavage |
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| Tenacity | Flexible non-elastic, sectile |
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| Mohs scale haurdness | 1–2 |
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| Skinkle | Metallic, yirdy |
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| Streak | Black |
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| Diaphaneity | Opaque, transparent anerly in extremely thin flakes |
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| Density | 2.09–2.23 g/cm3 |
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| Optical properties | Uniaxial (–) |
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| Pleochroism | Strang |
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| Solubility | Soluble in molten nickel, warm chlorosulfuric acid[1] |
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| Ither chairacteristics | strangly anisotropic, conducts electricity, creashie feel, readily merks |
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| References | [2][3][4] |
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