Mineralogy Database

Graphite Mineral Data

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General Graphite Information

Help on Chemical  Formula: Chemical Formula: C
Help on Composition: Composition: Molecular Weight = 12.01 gm
   Carbon 100.00 %  C
          100.00 % 
Help on Empirical Formula: Empirical Formula: C
Help on Environment: Environment: Metamorphosed limestones, organic-rich shales, and coal beds..
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) Prehistoric
Help on Locality: Locality: Ticonderoga, New York. Madagascar and Ceylon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, graphein, "to write."
Help on Name Pronunciation: Name Pronunciation: Graphite Say GRAPHITE
Help on Synonym: Synonym: Black Lead

Graphite Image

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Comments: A crystal of graphite in gneiss.
Location: Forchheim, Pockau, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Black, sub-hexagonal crystal of graphite in calcite.
Location: Lead Hill Mine, (near Ticonderoga), Essex Co., New York, USA. Scale: Crystal size 1 mm.
© Paul M. Schumacher

Graphite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.73376
Help on Cell Dimensions: Cell Dimensions: a = 2.464, c = 6.736, Z = 4; V = 35.42 Den(Calc)= 2.25
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.35(1), 1.675(0.8), 1.541(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Graphite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Iron black, Dark gray, Black, Steel gray.
Help on Density: Density: 2.09 - 2.23, Average = 2.16
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black

Optical Properties of Graphite

Help on Optical Data: Optical Data: Uniaxial (-), w=1.93-2.07.
Help on RL Anisotrophism: RL Anisotrophism: Extreme.
Help on RL Pleochroism: RL Pleochroism: Strong, red.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Graphite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm    7.90   18.70 
 420 nm    7.80   18.80 
 440 nm    7.70   18.90 
 460 nm    7.60   19.20 
 480 nm    7.50   19.50 
 500 nm    7.50   19.80 
 520 nm    7.50   20.10 
 540 nm    7.40   20.50 
 560 nm    7.40   20.80 
 580 nm    7.40   21.30 
 600 nm    7.50   21.70 
 620 nm    7.50   22.20 
 640 nm    7.60   22.80 
 660 nm    7.60   23.40 
 680 nm    7.60   24.00 
 700 nm    7.60   24.60 
Calculated Relative Intensity Colors of Graphite in Air
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%

Calculated Properties of Graphite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.25 gm/cc
note: Specific Gravity of Graphite =2.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGraphite = 0.16 barns/electron
U=PEGraphite x rElectron Density= 0.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Graphite is Not Radioactive

Graphite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.03)with semi-metallic and non-metallic elements
  (01.03.06)Carbon Polymorph group Diamond C F d3m 4/m 3 2/m Graphite C P 63/mmc 6/m 2/m 2/m Lonsdaleite C P 63/mmc 6/m 2/m 2/m Chaoite C P 6/mmm 6/m 2/m 2/m Fullerite! C60 pseudo-CUBIC 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 01.CB.05a 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.C - Metalloids and Nonmetals
  01.CB -Carbon-silicon family
01.CB.05a Graphite C P 63/mmc 6/m 2/m 2/m

Other Graphite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Graphite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - Ecole des Mines de Paris
7 - Franklin Minerals(Dunn)
8 - Franklin Minerals(Palache)
9 - GeoScienceWorld
10 - Glendale Community College
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - MinDAT
16 - Mineral and Gemstone Kingdom
17 - Mineralienatlas (Deutsch)
18 - Online Mineral Museum
19 - QUT Mineral Atlas
20 - Ruff.Info
21 - Scandinavian mineral gallery

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Dana No: Strunz No: 01.CB.05a





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