General Information:
Chemical Formula:
K2Cu3FeS4
Composition:
(Molecular Weight = 452.95 gm)
Potassium 17.26 % K
Iron 12.33 % Fe
Copper 42.09 % Cu
Sulfur 28.32 % S
Empirical Formula:
K2Cu3Fe2+S4
IMA Status:
Approved IMA 1981
Physical Properties:
Cleavage:
[???] Indistinct
Color:
blue gray, copper brown, or black.
Density:
3.86
Diaphaniety:
Opaque
Hardness:
3.5 - Copper Penny
Luster:
Metallic
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