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Piergorite-(Ce) Mineral Data
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General Piergorite-(Ce) Information
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 Chemical Formula: |
Ca8Ce2(Al0.5 Fe+++0.5)([ ],Li,Be)2Si6B8O36(OH,F)2 |
| Composition: |
Molecular Weight = 1,498.89 gm |
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Lithium 0.23 % Li 0.49 % Li2O |
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Calcium 22.41 % Ca 31.35 % CaO |
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Lanthanum 2.87 % La 3.37 % La2O3 |
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Cerium 5.42 % Ce 6.35 % Ce2O3 |
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Praeseodymium 0.56 % Pr 0.66 % Pr2O3 |
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Samarium 0.10 % Sm 0.12 % Sm2O3 |
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Gadolinium 0.10 % Gd 0.12 % Gd2O3 |
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Yttrium 0.36 % Y 0.45 % Y2O3 |
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Thorium 5.11 % Th 5.81 % ThO2 |
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Magnesium 0.03 % Mg 0.05 % MgO |
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Zirconium 0.12 % Zr 0.16 % ZrO2 |
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Uranium 0.64 % U 0.72 % UO2 |
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Titanium 0.42 % Ti 0.69 % TiO2 |
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Manganese 0.26 % Mn 0.33 % MnO |
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Beryllium 0.22 % Be 0.60 % BeO |
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Aluminum 0.79 % Al 1.50 % Al2O3 |
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Iron 1.49 % Fe 2.13 % Fe2O3 |
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Silicon 11.28 % Si 24.13 % SiO2 |
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Boron 5.77 % B 18.58 % B2O3 |
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Hydrogen 0.07 % H 0.60 % H2O |
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Neodymium 1.35 % Nd 1.57 % Nd2O3 |
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Chlorine 0.24 % Cl 0.24 % Cl |
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- %
Cl -0.05 % -O=Cl2 |
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Oxygen 38.96 % O |
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Fluorine 1.22 % F 1.22 % F |
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- %
F -0.51 % -O=F2 |
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______ ______ |
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100.00 % 100.68 % = TOTAL OXIDE |
| 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 |
| Environment: |
Found in myarolitic cavities inside a volcanic ejectum of syenitic composition from the Vico complex. Hellandite group. |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Vetralla, Viterbo Province, Latium, Italy Link to MinDat.org Location Data. |
| 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. |
| Synonym: |
IMA2005-008 |
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