General Clinoholmquistite Information
|
 Chemical Formula: |
[ ](Li2Mg3Al2)Si8O22(OH)2 |
| Composition: |
Molecular Weight = 794.83 gm |
| |
Potassium 0.20 % K 0.24 % K2O |
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Sodium 1.30 % Na 1.75 % Na2O |
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Lithium 1.63 % Li 3.52 % Li2O |
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Calcium 1.31 % Ca 1.83 % CaO |
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Magnesium 5.90 % Mg 9.79 % MgO |
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Manganese 0.35 % Mn 0.45 % MnO |
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Aluminum 7.50 % Al 14.17 % Al2O3 |
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Iron 5.13 % Fe 6.15 % FeO / 0.50 % Fe2O3 |
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Silicon 28.27 % Si 60.47 % SiO2 |
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Hydrogen 0.02 % H 0.20 % H2O |
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Oxygen 46.62 % O |
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Fluorine 1.77 % F 1.77 % F |
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- %
F -0.74 % -O=F2 |
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______ ______ |
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100.00 % 100.10 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.45Ca0.05K0.04Li1.79Ca0.21Al2.21Mg1.93Fe2+0.68Li0.08Mn2+0.05Fe3+0.05Si8O22.98
F0.74(OH)0.18 |
| Environment: |
Occurs at the inner contact with lithium pegmatite around oligoclase andesite. Discredited as a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-mem ber, Fluoro-sodic-pedrizite, |
| IMA Status: |
Discredited IMA 2005 |
| Locality: |
Tastyg spodumene deposit, Tuva, Siberia, Russia, Link to MinDat.org Location Data. |
| Name Origin: |
Named for its monoclinic crystal structure and relationship with holmsquisite. Approved IMA 1985, Discredited IMA 2005 as being fluoro-sodic-pedrizite. |
| Synonym: |
Discredited - IMA2004-002 |
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