Graphite

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.

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]

References

1. Liquid method: pure graphene production. Phys.org (May 30, 2010).
2. Graphite. Mindat.org.
3. Graphite. Webmineral.com.
4. Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1990). "Graphite". Handbook of Mineralogy (PDF). I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209708.