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Physical Properties of Graphite
Cleavage:
{0001} Perfect
Color:
Iron black, Dark gray, Black, Steel gray.
Density:
2.09 - 2.23, Average = 2.16
Diaphaneity:
Opaque
Fracture:
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Habit:
Foliated - Two dimensional platy forms.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Magnetism:
Nonmagnetic
Streak:
black
Optical Properties of Graphite
Optical Data:
Uniaxial (-), w=1.93-2.07.
RL Anisotrophism:
Extreme.
RL Pleochroism:
Strong, red.
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
Relative Intensity
0%
100%
200%
300%
400%
500%
600%
700%
800%
900%
1000%
R1
R2
Calculated Properties of Graphite
Electron Density:
Bulk Density (Electron Density)=2.25 gm/cc note: Specific Gravity of Graphite =2.25 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEGraphite = 0.16 barns/electron U=PEGraphite x rElectron Density= 0.36 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Graphite is Not Radioactive
Chemical Formula: 
