General Information:
Chemical Formula:CaNa(Fe++,Mg)3Fe+++2[AlSi7O22](OH)2
Composition:(Molecular Weight = 928.23 gm)Sodium 2.48 %
NaCalcium 4.32 %
CaMagnesium 1.96 %
MgAluminum 2.91 %
AlIron 25.57 %
FeSilicon 21.18 %
SiHydrogen 0.22 %
H Oxygen 41.37 %
O Empirical Formula: CaNaFe2+2.25Mg0.75Fe3+2(Si7AlO22)(OH)2
IMA Status:Approved IMA 1997
Physical Properties: Diaphaniety:Transparent to Translucent
Hardness:5-6 - Between Apatite and Orthoclase
Luster:Vitreous (Glassy)
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