General Information:
Chemical Formula:(Na,K)2(Mg,Fe++)5Si12O30
Composition:(Molecular Weight = 1,031.99 gm)Potassium 1.89 %
K Sodium 3.34 %
NaMagnesium 8.83 %
MgIron 6.76 %
FeSilicon 32.66 %
SiOxygen 46.51 %
O Empirical Formula: Na1.5K0.5Mg3.75Fe2+1.25Si12O30
IMA Status:Approved IMA 1966
Physical Properties: Cleavage:None
Color:blue green, colorless, yellow, or reddish brown.
Density:2.6
Diaphaniety:Transparent
Hardness:5-6 - Between Apatite and Orthoclase
Luster:Vitreous (Glassy)
Streak:white
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