General Information:
Chemical Formula:
(Mn,Mg)7(SiO4)3(OH)2
Composition:
(Molecular Weight = 641.22 gm)
Magnesium 6.63 % Mg
Manganese 44.98 % Mn
Silicon 13.14 % Si
Hydrogen 0.31 % H
Oxygen 34.93 % O
Empirical Formula:
Mn2+5.25Mg1.75(SiO4)3(OH)2
IMA Status:
Approved IMA 1978
Physical Properties:
Cleavage:
[010] Perfect
Color:
brown, brown orange, or light orange.
Density:
3.83
Diaphaniety:
Transparent to Translucent
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
white
More details...