General Information:
Chemical Formula:
K3Fe10S14
Composition:
(Molecular Weight = 1,124.69 gm)
Potassium 10.43 % K
Iron 49.66 % Fe
Sulfur 39.92 % S
Empirical Formula:
K3Fe2+10S14
IMA Status:
Approved IMA 1978
Locality:
Coyote Peak diatreme, 16 miles SW of Orick, Humboldt Co. California.
Physical Properties:
Cleavage:
[112] Distinct
Color:
black brown.
Density:
3.305
Diaphaniety:
Opaque
Hardness:
3.5 - Copper Penny
Luster:
Metallic
Streak:
black
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