General Information:
Chemical Formula:NaCa2(Fe++,Mn++)4MgFe+++(PO4)6·2(H2O)
Composition:(Molecular Weight = 1,011.64 gm)Sodium 2.27 %
NaCalcium 7.92 %
CaMagnesium 2.40 %
MgManganese 5.43 %
MnIron 22.08 %
FePhosphorus 18.37 %
P Hydrogen 0.40 %
H Oxygen 41.12 %
O Empirical Formula: NaCa24(Fe2+0.75)4(Mn2+0.25)MgFe3+(PO4)6·2(H2O)
IMA Status:Approved IMA 1979
Physical Properties: Cleavage:[010] Good
Color:bluish black, dark blue, or black.
Density:3.54
Hardness:4.5-5
Luster:Sub Metallic
Streak:green
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