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Rowland J F , Gabe E J , Hall S R , The Canadian Mineralogist , 13 (1975) p.188-196, The crystal structures of costibite (CoSbS) and paracostibite(CoSbS)
Physical Properties of Paracostibite
Color:
Gray white, White.
Density:
6.9
Diaphaneity:
Opaque
Habit:
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Hardness:
7 - Quartz
Luster:
Metallic
Optical Properties of Paracostibite
RL Anisotrophism:
Weak, faint pink to pale buff.
RL Color:
White with a faint grayish tinge.
RL Pleochroism:
Weak.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Paracostibite in Air
λ
R1
R2
∑ R1(λ)
∑ R2(λ)
400 nm
47.80
47.90
420 nm
48.00
48.50
440 nm
48.20
48.90
460 nm
48.20
48.90
480 nm
48.20
49.20
500 nm
48.40
49.60
520 nm
48.70
49.60
540 nm
48.90
49.40
560 nm
49.00
49.30
580 nm
49.20
49.20
600 nm
49.50
49.30
620 nm
49.70
49.60
640 nm
49.90
49.90
660 nm
50.20
50.30
680 nm
50.30
50.60
700 nm
50.50
50.90
Calculated Relative Intensity Colors of Paracostibite in Air
Relative Intensity
0%
20%
40%
60%
80%
100%
120%
140%
160%
180%
190%
R1
R2
Calculated Properties of Paracostibite
Electron Density:
Bulk Density (Electron Density)=6.26 gm/cc note: Specific Gravity of Paracostibite =7.08 gm/cc.
Fermion Index:
Fermion Index = 0.0011304155 Boson Index = 0.9988695845
Photoelectric:
PEParacostibite = 201.52 barns/electron U=PEParacostibite x rElectron Density=1,260.77 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Paracostibite is Not Radioactive
Paracostibite Classification
Dana Class:
02.12.07.02(02)Sulfides - Including Selenides and Tellurides