General Information:
Chemical Formula:
Cu++Mn+++6SiO12
Composition:
(Molecular Weight = 613.25 gm)
Manganese 53.75 % Mn
Silicon 4.58 % Si
Copper 10.36 % Cu
Oxygen 31.31 % O
Empirical Formula:
CuMn3+6SiO12
IMA Status:
Approved IMA 1990
Locality:
TL: Greece, Milli, Avia and Andros Island
Physical Properties:
Cleavage:
None
Color:
black or dark brown.
Density:
4.96
Diaphaniety:
Opaque
Hardness:
6.5 - Pyrite
Luster:
Metallic
Streak:
brownish black
More details...