General Information:
Chemical Formula:
Cu3SbS4
Composition:
(Molecular Weight = 440.65 gm)
Copper 43.26 % Cu
Antimony 27.63 % Sb
Sulfur 29.11 % S
Empirical Formula:
Cu3SbS4
Environment:
Antimoney (Sb) analog of enargite (arsenic-As).
Locality:
Sierra de Famatina, La Rioja, Argentina.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[101] Good, [100] Distinct
Color:
grayish black, dark pink brown, or steel gray.
Density:
4.57
Diaphaniety:
Opaque
Hardness:
3-4 - Calcite-Fluorite
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
black
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