Akhtenskite

General Information:
 Chemical Formula:
Mn++++O2
 Composition:
(Molecular Weight = 86.94 gm)
Manganese 63.19 % Mn
Oxygen 36.81 % O 
 Empirical Formula:
Mn4+O2
 IMA Status:
Approved IMA 1983
 Locality:
TL: Russia, Urals, Akhtenskii dep
Physical Properties:
 Cleavage:
[???] Good
 Color:
gray or black.
 Density:
4
 Diaphaniety:
Opaque
 Streak:
black
More details...