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Semenovite Mineral Data
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General Semenovite Information
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 Chemical Formula: |
(Na,Ca)9(Ce,La)2(Fe++,Mn)(Si,Be)20(O,OH,F)48 |
| Composition: |
Molecular Weight = 1,875.54 gm |
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Potassium 0.08 % K 0.10 % K2O |
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Sodium 8.26 % Na 11.14 % Na2O |
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Calcium 4.36 % Ca 6.10 % CaO |
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Lanthanum 5.92 % La 6.95 % La2O3 |
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Cerium 5.53 % Ce 6.48 % Ce2O3 |
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La,Ce,Pr,Nd,Sm, 3.38 % RE 3.94 % REE2O3 |
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Yttrium 1.52 % Y 1.93 % Y2O3 |
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Manganese 1.41 % Mn 1.82 % MnO |
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Beryllium 3.00 % Be 8.32 % BeO |
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Aluminum 0.37 % Al 0.71 % Al2O3 |
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Zinc 0.42 % Zn 0.52 % ZnO |
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Iron 2.32 %
Fe 0.80 % FeO / 2.43 % Fe2O3 |
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Silicon 20.29 % Si 43.41 % SiO2 |
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Hydrogen 0.22 % H 1.94 % H2O |
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Lead 0.44 % Pb 0.48 % PbO |
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Oxygen 37.91 % O |
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Fluorine 4.57 % F 4.57 % F |
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- %
F -1.92 % -O=F2 |
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______ ______ |
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100.00 % 99.69 % = TOTAL OXIDE |
| Empirical Formula: |
Na6.74Ca2.04K0.04La0.8Ce0.74Y0.32REE0.44Mn2+0.48Fe2+0.21Zn0.12Pb0.04Fe3+0.57Si13.55
Be6.24Al0.26O40.4F4.51(OH)4.04 |
| Environment: |
Occurs in border zone of the only epididymite-eudidymite bearing albitite, in cavities and fractures. |
| IMA Status: |
Approved IMA 1972 |
| Locality: |
Ilimaussaq complex, South Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Yevgeny Ivanovich Semenov, (1951-), Russian mineralogist, IMGRE, Moscow, Russia. |
| Name Pronunciation: |
Semenovite + Pronunciation  |
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