General Information:
Chemical Formula:
Cu9S8
Composition:
(Molecular Weight = 828.44 gm)
Copper 69.03 % Cu
Sulfur 30.97 % S
Empirical Formula:
Cu9S8
IMA Status:
Approved IMA 1978
Locality:
Yarrow Creek, AB, Canada.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[0001] Distinct
Color:
black or blue.
Density:
4.89
Diaphaniety:
Opaque
Habits:
Tarnishes - Freshly fractured surfaces form a surface oxidation film, Massive - Uniformly indistinguishable crystals forming large masses.,
Hardness:
3.5 - Copper Penny
Luster:
Metallic
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