Mineralogy Database

Iwashiroite-(Y) Mineral Data

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General Iwashiroite-(Y) Information

Help on Chemical Formula: Chemical Formula: YTaO4
Help on Composition: Composition: Molecular Weight = 313.16 gm
   Calcium      0.13 %  Ca    0.18 % CaO
   Samarium     0.48 %  Sm    0.56 % Sm2O3
   Gadolinium   1.00 %  Gd    1.16 % Gd2O3
   Dysprosium   2.08 %  Dy    2.38 % Dy2O3
   Yttrium     23.00 %  Y    29.20 % Y2O3
   Holmium      0.53 %  Ho    0.60 % Ho2O3
   Erbium       1.60 %  Er    1.83 % Er2O3
   Thulium      0.54 %  Tm    0.62 % Tm2O3
   Lutetium     0.56 %  Lu    0.64 % Lu2O3
   Thorium      0.74 %  Th    0.84 % ThO2
   Ytterbium    2.76 %  Yb    3.15 % Yb2O3
   Uranium      0.76 %  U     0.86 % UO2
   Tantalum    33.51 %  Ta   40.92 % Ta2O5
   Titanium     0.31 %  Ti    0.51 % TiO2
   Niobium     11.57 %  Nb   16.55 % Nb2O5
   Oxygen      20.44 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.81Yb0.05Dy0.04Er0.03Gd0.02Lu0.01Ho0.01Sm0.01U0.01Th0.01Ca0.01Tm0.01Ta0.58Nb0.39Ti0.02O4
Help on Environment: Environment: Found in the dumps near the no. 1 pit. Suishoyama mine worked several NYF-type pegmatites. Dimorphous with formanite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Suishouyama pegmatite, Kawamata town, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the old prefectural name of Fukushima prefecture (Iwashiro).
Help on Synonym: Synonym: IMA2003-053