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Gonnardite Mineral Data
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General Gonnardite Information
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 Chemical Formula: |
Na2CaAl4Si6O20•7(H2O) |
| Composition: |
Molecular Weight = 808.59 gm |
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Sodium 5.69 % Na 7.67 % Na2O |
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Calcium 4.96 % Ca 6.94 % CaO |
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Aluminum 13.35 % Al 25.22 % Al2O3 |
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Silicon 20.84 % Si 44.58 % SiO2 |
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Hydrogen 1.75 % H 15.60 % H2O |
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Oxygen 53.42 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na2CaAl4Si6O20•7(H2O) |
| Environment: |
Secondary mineral in basalts. |
| IMA Status: |
Valid Species (Pre-IMA) 1896 |
| Locality: |
Gignat, Puy-de-Dome, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Ferdinand Gonnard, French mineralogist, Lyons, France. |
| Name Pronunciation: |
Gonnardite + Pronunciation  |
| Synonym: |
ICSD 29522 |
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PDF 45-1324 |
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Tetranatrolite |
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