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Jimthompsonite Mineral Data
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General Jimthompsonite Information
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 Chemical Formula: |
(Mg,Fe++)5Si6O16(OH)2 |
| Composition: |
Molecular Weight = 619.47 gm |
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Magnesium 14.71 % Mg 24.40 % MgO |
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Iron 11.27 % Fe 14.50 % FeO |
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Silicon 27.20 % Si 58.20 % SiO2 |
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Hydrogen 0.33 % H 2.91 % H2O |
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Oxygen 46.49 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mg3.75Fe2+1.25Si6O16(OH)2 |
| Environment: |
In the black wallrock between chlorite and actinolite zones of a metamorphosed ultramafic body. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
In the Carleton talc quarry, near Chester, Windsor Co., Vermont, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for James Burleigh Thompson, Jr. (1921- ), eminent petrologist of Harvard University, Cambridge, Massachusetts, USA. |
| Name Pronunciation: |
Jimthompsonite + Pronunciation  |
| Synonym: |
ICSD 100657 |
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PDF 31-638 |
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