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IMA2008-024 Mineral Data
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General IMA2008-024 Information
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 Chemical Formula: |
(Ca,Na,REE,[ ])7(Nb,Ti)[Si2O7]2OF3 |
| Composition: |
Molecular Weight = 841.27 gm |
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Sodium 5.47 % Na 7.37 % Na2O |
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Calcium 19.06 % Ca 26.66 % CaO |
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La,Ce,Pr,Nd,Sm, 17.12 % RE 19.97 % REE2O3 |
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Titanium 1.42 % Ti 2.37 % TiO2 |
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Niobium 8.28 % Nb 11.85 % Nb2O5 |
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Silicon 13.35 % Si 28.57 % SiO2 |
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Oxygen 28.53 % O |
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Fluorine 6.77 % F 6.77 % F |
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- %
F -2.85 % -O=F2 |
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______ ______ |
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100.00 % 100.71 % = TOTAL OXIDE |
| Empirical Formula: |
Ca4Na2REENb0.75Ti0.25(Si2O7)2OF3 |
| Environment: |
Rinkite group |
| IMA Status: |
Proposed IMA 2008 (Dana # Added) |
| Locality: |
Rouma Island, Los Archipelago, Guinea Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
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