General Information:
Chemical Formula:
K(Mn+++2Li)Si4O12
Composition:
(Molecular Weight = 460.25 gm)
Potassium 8.50 % K
Lithium 1.51 % Li
Manganese 23.87 % Mn
Silicon 24.41 % Si
Oxygen 41.71 % O
Empirical Formula:
KMn3+2LiSi4O12
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Perfect
Color:
brownish black or black.
Density:
3.264
Diaphaniety:
Translucent
Hardness:
2.5 - Finger Nail
Luster:
Sub Metallic
Streak:
light brown
More details...