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Dravite Mineral Data
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General Dravite Information
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 Chemical Formula: |
NaMg3Al6(BO3)3Si6O18(OH)4 |
| Composition: |
Molecular Weight = 958.75 gm |
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Sodium 2.40 % Na 3.23 % Na2O |
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Magnesium 7.61 % Mg 12.61 % MgO |
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Aluminum 16.89 % Al 31.90 % Al2O3 |
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Silicon 17.58 % Si 37.60 % SiO2 |
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Boron 3.38 % B 10.89 % B2O3 |
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Hydrogen 0.42 % H 3.76 % H2O |
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Oxygen 51.73 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaMg3Al6(BO3)3Si6O18(OH)4 |
| Environment: |
Metasomatically altered magnesian or dolomitic limestones in contact-metamorphic aureoles. |
| IMA Status: |
Valid Species (Pre-IMA) 1883 (Dana # Changed) |
| Locality: |
Drava River, Austria. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Dravite  |
| Synonym: |
Dravite - (61.3.1.9) |
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ICSD 72937 |
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PDF 44-1457 |
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Tourmaline |
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