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Niobokupletskite Mineral Data
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General Niobokupletskite Information
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 Chemical Formula: |
K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) |
| Composition: |
Molecular Weight = 1,377.37 gm |
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Potassium 5.68 % K 6.84 % K2O |
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Sodium 2.34 % Na 3.15 % Na2O |
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Zirconium 2.65 % Zr 3.58 % ZrO2 |
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Titanium 1.04 % Ti 1.74 % TiO2 |
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Manganese 21.54 % Mn 27.81 % MnO |
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Niobium 8.77 % Nb 12.54 % Nb2O5 |
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Zinc 3.32 % Zn 4.14 % ZnO |
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Iron 2.03 % Fe 2.61 % FeO |
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Silicon 16.31 % Si 34.90 % SiO2 |
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Hydrogen 0.29 % H 2.62 % H2O |
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Oxygen 35.89 % O |
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Fluorine 0.14 % F 0.14 % F |
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- %
F -0.06 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K2Na1.4Mn2+5.4Zn0.7Fe2+0.5Nb1.3Zr0.4Ti0.3Si8O26.9(OH)4F0.1 |
| Environment: |
Nepheline syenite pegmatite at the Poudrette quarry. Epitaxially overgrown on kupletskite. Astrophyllite group |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the Nb analog of kupletskite. |
| Synonym: |
ICSD 89859 |
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IMA1999-032 |
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