General Information:
Chemical Formula:
[](CaNa)Fe++3AlFe+++Si7AlO22(OH)2
Composition:
(Molecular Weight = 923.02 gm)
Sodium 2.49 % Na
Calcium 4.34 % Ca
Aluminum 5.85 % Al
Iron 24.20 % Fe
Silicon 21.30 % Si
Hydrogen 0.22 % H
Oxygen 41.60 % O
Empirical Formula:
CaNaFe2+3AlFe3+(Si7AlO22)(OH)2
IMA Status:
Approved IMA 1978
Physical Properties:
Color:
green.
Hardness:
5-6 - Between Apatite and Orthoclase
More details...