With other sulfides in hydrothermal copper ore veins.
IMA Status:
Valid Species (Pre-IMA) 1933
Locality:
In the USA, from the Leonard mine, south of the Colusa claim, and from other mines at Butte, Silver Bow County, Montana, USA. Link to MinDat.org Location Data.
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Crystal Structure:
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Zachariasen W H , American Mineralogist , 18 (1933) p.534-537, X-Ray examination of colusite, (Cu,Fe,Mo,Sn)4(S,As,Te)3-4
View Additional jPOWD Structure files for Colusite
[1]
Physical Properties of Colusite
Cleavage:
None
Color:
Bronze.
Density:
4.2
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
3-4 - Calcite-Fluorite
Luster:
Metallic
Streak:
black
Optical Properties of Colusite
RL Color:
Cream.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Colusite in Air
λ
R
∑ R(λ)
400 nm
22.00
420 nm
23.50
440 nm
25.00
460 nm
25.90
480 nm
26.60
500 nm
27.50
520 nm
28.80
540 nm
30.00
560 nm
30.90
580 nm
31.60
600 nm
31.90
620 nm
31.50
640 nm
30.80
660 nm
29.80
680 nm
28.70
700 nm
27.80
Calculated Relative Intensity Colors of Colusite in Air
Relative Intensity
0%
40%
80%
100%
120%
160%
200%
240%
280%
320%
350%
R
Calculated Properties of Colusite
Electron Density:
Bulk Density (Electron Density)=4.30 gm/cc note: Specific Gravity of Colusite =4.63 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEColusite = 62.68 barns/electron U=PEColusite x rElectron Density= 269.36 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Colusite is Not Radioactive