Panethite

General Information:
 Chemical Formula:
(Na,Ca,K)2(Mg,Fe++,Mn)2(PO4)2
 Composition:
(Molecular Weight = 323.06 gm)
Potassium 2.42 % K 
Sodium 8.54 % Na
Calcium 7.44 % Ca
Magnesium 9.03 % Mg
Manganese 3.40 % Mn
Iron 10.37 % Fe
Phosphorus 19.18 % P 
Oxygen 39.62 % O 
 Empirical Formula:
Na1.2Ca0.6K0.2Mg1.2Fe2+0.6Mn2+0.2(PO4)2
 IMA Status:
Approved IMA 1967
Physical Properties:
 Color:
brownish yellow.
 Density:
2.9 - 3, Average = 2.95
 Diaphaniety:
Transparent
 Luster:
Vitreous (Glassy)
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