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Ferrokentbrooksite Mineral Data
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General Ferrokentbrooksite Information
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 Chemical Formula: |
Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 |
| Composition: |
Molecular Weight = 3,231.96 gm |
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Potassium 0.39 % K 0.47 % K2O |
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Sodium 9.28 % Na 12.51 % Na2O |
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Strontium 0.41 % Sr 0.48 % SrO |
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Calcium 5.98 % Ca 8.36 % CaO |
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La,Ce,Pr,Nd,Sm, 4.41 % RE 5.15 % REE2O3 |
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Yttrium 0.47 % Y 0.59 % Y2O3 |
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Hafnium 0.17 % Hf 0.20 % HfO2 |
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Zirconium 8.67 % Zr 11.70 % ZrO2 |
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Tantalum 0.11 % Ta 0.14 % Ta2O5 |
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Titanium 0.06 % Ti 0.10 % TiO2 |
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Manganese 3.14 % Mn 4.06 % MnO |
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Niobium 1.84 % Nb 2.63 % Nb2O5 |
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Aluminum 0.06 % Al 0.11 % Al2O3 |
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Iron 4.13 % Fe 5.31 % FeO |
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Silicon 21.86 % Si 46.77 % SiO2 |
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Hydrogen 0.04 % H 0.33 % H2O |
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Chlorine 0.98 % Cl 0.98 % Cl |
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- %
Cl -0.22 % -O=Cl2 |
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Oxygen 37.13 % O |
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Fluorine 0.89 % F 0.89 % F |
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- %
F -0.37 % -O=F2 |
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______ ______ |
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100.00 % 100.19 % = TOTAL OXIDE |
| Empirical Formula: |
Na13.05REE0.99K0.32Ca0.23Sr0.15Ca4.59Mn2+1.24Y0.17Fe2+2.39Mn2+0.61Zr3Ti0.04Hf0.03
Nb0.64Si0.23Zr0.07Ta0.02Si24.93Al0.07(OH)0.4 |
| Environment: |
Primary late-stage phase in a small pegmatite dike in nepheline syenite. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the Fe-analogue of kentbrooksite. |
| Synonym: |
IMA1999-046 |
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