General Information:
Chemical Formula:
Na(CaNa)(Fe++,Mg)3Fe+++2[Si6Al2O22](OH)2
Composition:
(Molecular Weight = 942.23 gm)
Sodium 4.88 % Na
Calcium 4.25 % Ca
Magnesium 2.58 % Mg
Aluminum 5.73 % Al
Iron 23.71 % Fe
Silicon 17.88 % Si
Hydrogen 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)
More details...