General Information:
Chemical Formula:
Na8Mn++Ti++++3Si4O12(PO4)2O4
Composition:
(Molecular Weight = 940.77 gm)
Sodium 19.55 % Na
Titanium 15.27 % Ti
Manganese 5.84 % Mn
Silicon 11.94 % Si
Phosphorus 6.58 % P
Oxygen 40.82 % O
Empirical Formula:
Na8Mn2+Ti3Si4O16(PO4)2
IMA Status:
Approved IMA 1963
Physical Properties:
Cleavage:
[100] Perfect
Color:
dark brown, pink violet, or black.
Density:
3.15
Diaphaniety:
Transparent to Subopaque
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous - Adamantine
More details...