General Information:
Chemical Formula:
KNa2(Fe++,Mn++,Al)2Li3Si12O30
Composition:
(Molecular Weight = 1,028.28 gm)
Potassium 3.80 % K
Sodium 4.47 % Na
Lithium 2.03 % Li
Manganese 3.21 % Mn
Aluminum 0.52 % Al
Iron 6.52 % Fe
Silicon 32.78 % Si
Oxygen 46.68 % O
Empirical Formula:
KNa2Fe2+1.2Mn2+0.6Al0.2Li3Si12O30
IMA Status:
Approved IMA 1976
Physical Properties:
Cleavage:
[0001] Indistinct
Color:
brownish yellow, violet, or reddish violet.
Density:
2.74
Diaphaniety:
Transparent to Translucent
Hardness:
6-6.5 - Orthoclase-Pyrite
Luster:
Vitreous (Glassy)
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