General Information:
Chemical Formula:
Mg3(Fe,Al,Si)2(SiO4)3
Composition:
(Molecular Weight = 437.99 gm)
Magnesium 16.65 % Mg
Aluminum 3.70 % Al
Iron 15.30 % Fe
Silicon 20.52 % Si
Oxygen 43.84 % O
Empirical Formula:
Mg3Fe3+1.2Al0.6Si0.2(SiO4)3
IMA Status:
Approved IMA 1970
Physical Properties:
Cleavage:
None
Color:
yellow brown or purple red.
Density:
4
Diaphaniety:
Transparent to Translucent
Hardness:
7-7.5
Luster:
Vitreous (Glassy)
Streak:
white
More details...