General Information:
Chemical Formula:
Na(CaNa)Mg3ALFe+++[Si6Al2O22](OH)2
Composition:
(Molecular Weight = 850.28 gm)
Sodium 5.41 % Na
Calcium 4.71 % Ca
Magnesium 8.58 % Mg
Aluminum 9.52 % Al
Iron 6.57 % Fe
Silicon 19.82 % Si
Hydrogen 0.24 % H
Oxygen 45.16 % O
Empirical Formula:
Na2CaMg3AlFe3+(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
Color:
green.
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous (Glassy)
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