Mineralogy Database

Ungursaite Mineral Data

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General Ungursaite Information

Help on Chemical  Formula: Chemical Formula: NaCa5(Ta,Nb)24O65(OH)
Help on Composition: Composition: Molecular Weight = 5,094.85 gm
   Sodium     0.45 %  Na    0.61 % Na2O
   Calcium    3.93 %  Ca    5.50 % CaO
   Tantalum  63.93 %  Ta   78.06 % Ta2O5
   Niobium   10.94 %  Nb   15.65 % Nb2O5
   Hydrogen   0.02 %  H     0.18 % H2O
   Oxygen    20.73 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa5Ta18Nb6O65(OH)
Help on Environment: Environment: Occurs in the margins of thoreaulite crystals from granitic pegmatite.
Help on IMA Status: IMA Status: Not Approved IMA 1988 - Published 1985
Help on Locality: Locality: Ungursai, East Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 65336
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