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Montmorillonite Mineral Data
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General Montmorillonite Information
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 Chemical Formula: |
(Na,Ca)0,3(Al,Mg)2Si4O10(OH)2•n(H2O) |
| Composition: |
Molecular Weight = 549.07 gm |
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Sodium 0.84 % Na 1.13 % Na2O |
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Calcium 0.73 % Ca 1.02 % CaO |
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Aluminum 9.83 % Al 18.57 % Al2O3 |
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Silicon 20.46 % Si 43.77 % SiO2 |
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Hydrogen 4.04 % H 36.09 % H2O |
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Oxygen 64.11 % O |
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______ ______ |
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100.00 % 100.58 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.2Ca0.1Al2Si4O10(OH)2(H2O)10 |
| IMA Status: |
Valid Species (Pre-IMA) 1847 |
| Locality: |
Veinne, Montmorillone, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality. |
| Name Pronunciation: |
Montmorillonite + Pronunciation  |
| Synonym: |
Bentonite |
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