Mineralogy Database

Piergorite-(Ce) Mineral Data

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General Piergorite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Ca8Ce2(Al0.5 Fe+++0.5)([ ],Li,Be)2Si6B8O36(OH,F)2
Help on Composition: Composition: Molecular Weight = 1,498.89 gm
   Lithium         0.23 %  Li    0.49 % Li2O
   Calcium        22.41 %  Ca   31.35 % CaO
   Lanthanum       2.87 %  La    3.37 % La2O3
   Cerium          5.42 %  Ce    6.35 % Ce2O3
   Praeseodymium   0.56 %  Pr    0.66 % Pr2O3
   Samarium        0.10 %  Sm    0.12 % Sm2O3
   Gadolinium      0.10 %  Gd    0.12 % Gd2O3
   Yttrium         0.36 %  Y     0.45 % Y2O3
   Thorium         5.11 %  Th    5.81 % ThO2
   Magnesium       0.03 %  Mg    0.05 % MgO
   Zirconium       0.12 %  Zr    0.16 % ZrO2
   Uranium         0.64 %  U     0.72 % UO2
   Titanium        0.42 %  Ti    0.69 % TiO2
   Manganese       0.26 %  Mn    0.33 % MnO
   Beryllium       0.22 %  Be    0.60 % BeO
   Aluminum        0.79 %  Al    1.50 % Al2O3
   Iron            1.49 %  Fe    2.13 % Fe2O3
   Silicon        11.28 %  Si   24.13 % SiO2
   Boron           5.77 %  B    18.58 % B2O3
   Hydrogen        0.07 %  H     0.60 % H2O
   Neodymium       1.35 %  Nd    1.57 % Nd2O3
   Chlorine        0.24 %  Cl    0.24 % Cl
                    -   %   Cl   -0.05 % -O=Cl2   
   Oxygen         38.96 %  O
   Fluorine        1.22 %  F     1.22 % F
                    -   %   F    -0.51 % -O=F2    
                 ______        ______ 
                 100.00 %      100.68 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca8.38Mg0.02La0.31Ce0.58Y0.06Pr0.06Nd0.14Sm0.01Th0.33U0.04Zr0.02Gd0.01Li0.49Fe3+0.4 Mn2+0.07Ti0.13Al0.44Be0.36Si6.02O36
Help on Environment: Environment: Found in myarolitic cavities inside a volcanic ejectum of syenitic composition from the Vico complex. Hellandite group.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Vetralla, Viterbo Province, Latium, Italy Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as an acronym from the names of two Italian collectors that have provided us with the sample in study: Giancarlo PIERini and Pietro GORini.
Help on Synonym: Synonym: IMA2005-008