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Fleet M E , Acta Crystallographica, Section C , 43 (1987) p.2255-2257, Structure of godlevskite, Ni9S8
Physical Properties of Godlevskite
Color:
Bronze yellow.
Density:
5.27
Diaphaneity:
Opaque
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Hardness:
4-5 - Fluorite-Apatite
Luster:
Metallic
Streak:
gray
Optical Properties of Godlevskite
RL Anisotrophism:
Strong, from bluish to reddish.
RL Color:
Pale yellow.
RL Pleochroism:
Weak, pale cream to pinkish cream.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Godlevskite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
27.20
29.40
420 nm
32.60
36.00
440 nm
38.00
42.60
460 nm
42.20
46.30
480 nm
45.20
48.70
500 nm
47.80
50.30
520 nm
49.10
51.40
540 nm
50.50
52.20
560 nm
51.50
52.70
580 nm
52.40
53.00
600 nm
53.30
53.30
620 nm
54.20
53.70
640 nm
55.00
54.10
660 nm
55.80
54.70
680 nm
56.50
55.20
700 nm
57.20
55.80
Calculated Relative Intensity Colors of Godlevskite in Air
Relative Intensity
0%
30%
60%
90%
100%
120%
150%
180%
210%
230%
R1
R2
Calculated Properties of Godlevskite
Electron Density:
Bulk Density (Electron Density)=5.13 gm/cc note: Specific Gravity of Godlevskite =5.31 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEGodlevskite = 27.98 barns/electron U=PEGodlevskite x rElectron Density= 143.65 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Godlevskite is Not Radioactive
Godlevskite Classification
Dana Class:
02.07.04.01(02)Sulfides - Including Selenides and Tellurides