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