Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above
Forms:
( 1 1 1)
Warning: this java applet does not work in some browsers because of security restrictions.
Physical Properties of Chromite
Cleavage:
None
Color:
Black, Brownish black.
Density:
4.5 - 5.09, Average = 4.79
Diaphaneity:
Opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Nuggets - Irregular lumps produced by stream transport of malleable metals.
Hardness:
5.5 - Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Metallic
Magnetism:
Naturally weak
Streak:
brown
Optical Properties of Chromite
Gladstone-Dale:
CI meas= 0.092 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.145 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.22,KPDmeas= 0.2336,KC= 0.2573 Ncalc = 2.16 - 2.31
Optical Data:
Isotropic, n=2.08-2.16.
RL Color:
Gray-white with a brownish tint and brownish red internal reflections.
RL Pleochroism:
None.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Chromite in Air
λ
R
∑ R(λ)
400 nm
13.20
420 nm
13.10
440 nm
13.00
460 nm
12.80
480 nm
12.60
500 nm
12.40
520 nm
12.20
540 nm
12.00
560 nm
11.90
580 nm
11.80
600 nm
11.70
620 nm
11.70
640 nm
11.60
660 nm
11.60
680 nm
11.60
700 nm
11.60
Calculated Relative Intensity Colors of Chromite in Air
Relative Intensity
0%
80%
100%
160%
240%
320%
400%
480%
560%
640%
720%
740%
R
Calculated Properties of Chromite
Electron Density:
Bulk Density (Electron Density)=4.54 gm/cc note: Specific Gravity of Chromite =4.80 gm/cc.
Fermion Index:
Fermion Index = 0.04 Boson Index = 0.96
Photoelectric:
PEChromite = 18.28 barns/electron U=PEChromite x rElectron Density= 83.03 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chromite is Not Radioactive
Chemical Formula: 
