General Information:
Chemical Formula:
(Co,Fe)AsS
Composition:
(Molecular Weight = 165.15 gm)
Iron 8.45 % Fe
Cobalt 26.76 % Co
Arsenic 45.37 % As
Sulfur 19.42 % S
Empirical Formula:
Co0.75Fe2+0.25AsS
Locality:
COBALT GRANT
Physical Properties:
Cleavage:
[010] Perfect, [101] Distinct
Color:
gray or silver white.
Density:
5.9 - 6.01, Average = 5.95
Diaphaniety:
Opaque
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
black
More details...