General Information:
Chemical Formula:
Na(CaNa)(Mg,Fe++)3Fe+++2[Si6Al2O22](OH)2
Composition:
(Molecular Weight = 910.69 gm)
Sodium 5.05 % Na
Calcium 4.40 % Ca
Magnesium 5.34 % Mg
Aluminum 5.93 % Al
Iron 18.40 % Fe
Silicon 18.50 % Si
Hydrogen 0.22 % H
Oxygen 42.16 % O
Empirical Formula:
Na2CaMg2Fe2+Fe3+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
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