General Information:
Chemical Formula:
CuFeS2·(H2O)
Composition:
(Molecular Weight = 201.54 gm)
Iron 27.71 % Fe
Copper 31.53 % Cu
Hydrogen 1.00 % H
Sulfur 31.82 % S
Oxygen 7.94 % O
Empirical Formula:
CuFe2+S2H2O
Environment:
Mafic alkalic diatreme.
IMA Status:
Approved IMA 1983
Locality:
Coyote Peak diatreme, 16 miles SW of Orick, Santa Cruz Co., California.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[001] Good
Color:
brass yellow.
Density:
4.212
Diaphaniety:
Opaque
Hardness:
3.5 - Copper Penny
Luster:
Metallic
Streak:
black
More details...