General Information:
Chemical Formula:
[ ](CaNa)Mg3AlFe+++Si7AlO22(OH)2
Composition:
(Molecular Weight = 828.39 gm)
Sodium 2.78 % Na
Calcium 4.84 % Ca
Magnesium 8.80 % Mg
Aluminum 6.51 % Al
Iron 6.74 % Fe
Silicon 23.73 % Si
Hydrogen 0.24 % H
Oxygen 46.35 % O
Empirical Formula:
CaNaMg3AlFe3+(Si7AlO22)(OH)2
IMA Status:
Approved IMA 1978
Physical Properties:
Cleavage:
[???] Good
Color:
blue.
Diaphaniety:
Transparent to Translucent
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous (Glassy)
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