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Gjerdingenite-Ca Mineral Data
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General Gjerdingenite-Ca Information
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 Chemical Formula: |
K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O |
| Composition: |
Molecular Weight = 1,216.40 gm |
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Potassium 2.99 % K 3.60 % K2O |
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Barium 0.90 % Ba 1.01 % BaO |
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Sodium 0.85 % Na 1.15 % Na2O |
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Strontium 2.95 % Sr 3.49 % SrO |
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Calcium 2.54 % Ca 3.55 % CaO |
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Titanium 5.98 % Ti 9.98 % TiO2 |
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Manganese 0.63 % Mn 0.82 % MnO |
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Niobium 19.17 % Nb 27.42 % Nb2O5 |
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Aluminum 0.07 % Al 0.13 % Al2O3 |
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Zinc 0.05 % Zn 0.07 % ZnO |
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Iron 0.14 % Fe 0.18 % FeO |
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Silicon 18.40 % Si 39.37 % SiO2 |
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Hydrogen 1.03 % H 9.24 % H2O |
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Oxygen 44.29 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.93Na0.45Sr0.41Ca0.15Ba0.08Ca0.62Mn2+0.14Fe2+0.03Zn0.01Nb2.51Ti1.52Si7.97Al0.03
O24O2.86(OH)1.14�5.67(H2O) |
| Environment: |
Found in peralkaline pegmatites related to agpaitic feldspathoidal syenites as an alteration product of vuonnemite. Labuntsovite group |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Pegmatite #61, Karnasurt, Lovozero, Kola Peninsula, Russia Link to MinDat.org Location Data. |
| Name Origin: |
Named as the Ca-dominant analogue of gjerdingenite-Fe |
| Synonym: |
IMA2005-029 |
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