General Information:
Chemical Formula:Na(CaNa)Fe++3AlFe+++[Si6Al2O22](OH)2
Composition:(Molecular Weight = 944.90 gm)Sodium 4.87 %
NaCalcium 4.24 %
CaAluminum 8.57 %
AlIron 23.64 %
FeSilicon 17.83 %
SiHydrogen 0.21 %
H Oxygen 40.64 %
O Empirical Formula: Na2CaFe2+3AlFe3+(Si6Al2O22)(OH)2
Environment:Nepheline-bearing igneous rocks.
IMA Status:Approved IMA 1978
Locality:Wali-tarama, Mariupol, Ukraine.
Name Origin:Named after the locality.
Physical Properties: Cleavage:[110] Perfect
Color:blue green or black.
Density:3.5
Diaphaniety:Transparent to Translucent
Hardness:5-6 - Between Apatite and Orthoclase
Luster:Vitreous (Glassy)
Streak:greenish gray
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