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Ferriwhittakerite Mineral Data
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General Ferriwhittakerite Information
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 Chemical Formula: |
Na(NaLi)(Mg2Fe+++2Li)Si8O22(OH)2 |
| Composition: |
Molecular Weight = 867.82 gm |
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Potassium 0.63 % K 0.76 % K2O |
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Sodium 5.09 % Na 6.86 % Na2O |
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Lithium 1.08 % Li 2.32 % Li2O |
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Calcium 0.51 % Ca 0.71 % CaO |
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Magnesium 4.12 % Mg 6.83 % MgO |
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Titanium 0.66 % Ti 1.10 % TiO2 |
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Manganese 0.76 % Mn 0.98 % MnO |
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Aluminum 0.31 % Al 0.59 % Al2O3 |
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Zinc 3.01 % Zn 3.75 % ZnO |
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Iron 13.26 % Fe 4.80 % FeO / 13.62 % Fe2O3 |
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Silicon 25.89 % Si 55.39 % SiO2 |
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Hydrogen 0.15 % H 1.35 % H2O |
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Oxygen 42.96 % O |
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Fluorine 1.58 % F 1.58 % F |
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- %
F -0.66 % -O=F2 |
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______ ______ |
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100.00 % 99.97 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.64K0.14Li0.62Na1.28Ca0.11Fe2+0.58Mg1.47Mn2+0.12Zn0.4Fe3+1.48Al0.1Ti0.12Li0.73
Si8O22(OH)1.3F0.72 |
| Environment: |
In episyenitic bodies. Amphibole group; structure determined |
| IMA Status: |
Proposed IMA 2002 (Dana # Added) |
| Locality: |
East sector of the Pedriza Massif, Sierra de Guadarrama, Spanish Central System, Spain. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Eric J.W. Whittaker (1921-), of Oxford University, who did pioneering work in amphibole crystal-chemistry. |
| Synonym: |
IMA2001-069 |
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