Mineralogy Database

Samarskite-(Y) Mineral Data

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General Samarskite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Fe+++,U)(Nb,Ta)5O4
Help on Composition: Composition: Molecular Weight = 299.85 gm
   La,Ce,Pr,Nd,Sm,  14.41 %  RE   16.81 % REE2O3
   Yttrium           5.93 %  Y     7.53 % Y2O3
   Uranium          15.88 %  U    18.01 % UO2
   Tantalum         12.07 %  Ta   14.74 % Ta2O5
   Niobium          24.79 %  Nb   35.46 % Nb2O5
   Iron              5.59 %  Fe    7.99 % Fe2O3
   Oxygen           21.34 %  O
                   ______        ______ 
                   100.00 %      100.53 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.2REE0.3Fe3+0.3U0.2Nb0.8Ta0.2O4
Help on Environment: Environment: Accessory mineral in REE-rich granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1847
Help on Locality: Locality: Miass, Ilmen Mountains, Southern Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Vasilii Yefrafovich von Samarski-Bykhovets (1803-1870), Chief of Staff of the Russian Corps of Mining Engineers.
Help on Name Pronunciation: Name Pronunciation: Samarskite-(Y) + Pronunciation Say SAMARSKITE-(Y)
Help on Synonym: Synonym: Priazovite - mixture of samarskite-(Y) and U,Ti-rich mineral of the pyrochlore group