General Information:
Chemical Formula:Na(CaNa)(Fe++,Mg)3Fe+++2[Si6Al2O22](OH)2
Composition:(Molecular Weight = 942.23 gm)Sodium 4.88 %
NaCalcium 4.25 %
CaMagnesium 2.58 %
MgAluminum 5.73 %
AlIron 23.71 %
FeSilicon 17.88 %
SiHydrogen 0.21 %
H Oxygen 40.75 %
O Empirical Formula: Na2CaMgFe2+2Fe3+2(Si6Al2O22)(OH)2
Environment:Nepheline-bearing igneous rocks.
IMA Status:Approved IMA 1978
Locality:Wali-tarama, Mariupol, Ukraine.
Name Origin:Named after the chemical composition and the locality.
Physical Properties: Cleavage:[110] Perfect
Density:3.47
Diaphaniety:Transparent to Translucent
Hardness:5-6 - Between Apatite and Orthoclase
Luster:Vitreous (Glassy)
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