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Chessexite Mineral Data
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General Chessexite Information
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 Chemical Formula: |
(K,Na)4Ca2Mg3Al8(SiO4)2(SO4)10(OH)10•40(H2O) |
| Composition: |
Molecular Weight = 2,528.59 gm |
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Potassium 3.09 % K 3.73 % K2O |
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Sodium 1.82 % Na 2.45 % Na2O |
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Calcium 3.17 % Ca 4.44 % CaO |
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Magnesium 2.88 % Mg 4.78 % MgO |
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Aluminum 8.54 % Al 16.13 % Al2O3 |
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Silicon 2.22 % Si 4.75 % SiO2 |
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Hydrogen 3.59 % H 32.06 % H2O |
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Sulfur 12.68 % S 31.66 % SO3 |
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Oxygen 62.01 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K2Na2Ca2Mg3Al8(SiO4)2(SO4)10(OH)10�40(H2O) |
| Environment: |
Coating fluorite. |
| IMA Status: |
Approved IMA 1982 |
| Locality: |
Maine mine, Autun, Saone et Loire, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Ronald Chessex (1929-), Swiss petrologist and professor, University of Geneva. |
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