Ferrobarroisite

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
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