General Information:
Chemical Formula:
Cu12(Te,Sb,As)4S13
Composition:
(Molecular Weight = 1,652.94 gm)
Copper 46.13 % Cu
Tellurium 25.47 % Te
Arsenic 3.17 % As
Sulfur 25.22 % S
Empirical Formula:
Cu12Te3.3As0.7S13
Locality:
Mohawk mine, Goldfield County., Nevada, USA.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
None
Color:
lead gray or iron black.
Density:
4.95
Diaphaniety:
Opaque
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Encrustations - Forms crust-like aggregates on matrix.,
Hardness:
3-3.5 - Calcite-Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
black
More details...