Mineralogy Database

Samarskite-(Yb) Mineral Data

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General Samarskite-(Yb) Information

Help on Chemical  Formula: Chemical Formula: (Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4
Help on Composition: Composition: Molecular Weight = 312.29 gm
   Calcium         1.58 %  Ca    2.21 % CaO
   Lanthanum       0.04 %  La    0.05 % La2O3
   Cerium          0.18 %  Ce    0.21 % Ce2O3
   Praeseodymium   0.05 %  Pr    0.05 % Pr2O3
   Samarium        0.39 %  Sm    0.45 % Sm2O3
   Gadolinium      0.50 %  Gd    0.58 % Gd2O3
   Dysprosium      2.81 %  Dy    3.22 % Dy2O3
   Yttrium         1.59 %  Y     2.02 % Y2O3
   Holmium         0.53 %  Ho    0.60 % Ho2O3
   Erbium          3.11 %  Er    3.55 % Er2O3
   Thulium         0.54 %  Tm    0.62 % Tm2O3
   Lutetium        0.90 %  Lu    1.02 % Lu2O3
   Terbium         0.25 %  Tb    0.29 % Tb2O3
   Thorium         9.29 %  Th   10.57 % ThO2
   Ytterbium       5.32 %  Yb    6.06 % Yb2O3
   Zirconium       0.76 %  Zr    1.03 % ZrO2
   Scandium        0.17 %  Sc    0.26 % Sc2O3
   Uranium         9.60 %  U    10.89 % UO2
   Tantalum       12.98 %  Ta   15.85 % Ta2O5
   Titanium        0.41 %  Ti    0.69 % TiO2
   Manganese       0.83 %  Mn    1.07 % MnO
   Niobium        21.66 %  Nb   30.98 % Nb2O5
   Iron            2.07 %  Fe    2.67 % FeO
   Silicon         0.20 %  Si    0.42 % SiO2
   Tin             0.46 %  Sn    0.58 % SnO2
   Lead            0.27 %  Pb    0.29 % PbO
   Tungsten        2.47 %  W     3.12 % WO3
   Neodymium       0.55 %  Nd    0.65 % Nd2O3
   Oxygen         20.49 %  O
                 ______        ______ 
                 100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Yb0.09Er0.05Y0.05Dy0.05Lu0.01Nd0.01Tm0.01Ho0.01Gd0.01Sm0.008Tb0.005Ce0.004Pr0.001La0.001U0.12 Th0.12Ca0.12Fe2+0.11Mn2+0.04O4
Help on Environment: Environment: Found as anhedral masses up to tens of centimeters across that are intimately intergrown with ferrocolumbite and zircon.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Little Patsy pegmatite, Jefferson Co., Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Yb-dominant analogue of samarskite.
Help on Name Pronunciation: Name Pronunciation: Samarskite-(Yb) + Pronunciation Say SAMARSKITE-(YB)
Help on Synonym: Synonym: IMA2004-001