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Bertrandite Mineral Data
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General Bertrandite Information
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 Chemical Formula: |
Be4Si2O7(OH)2 |
| Composition: |
Molecular Weight = 238.23 gm |
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Beryllium 15.13 % Be 42.00 % BeO |
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Silicon 23.58 % Si 50.44 % SiO2 |
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Hydrogen 0.85 % H 7.56 % H2O |
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Oxygen 60.44 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Be4(Si2O7)(OH)2 |
| Environment: |
Commonly found in Be-bearing pegmatites and may be derived from the alteration of beryl. |
| IMA Status: |
Valid Species (Pre-IMA) 1883 |
| Locality: |
Discovered at near Nantes, Loire-Inferieure, France. Also found at Irkutka and Altai Mountains, Siberia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the French mineralogist, E. Bertrand. |
| Name Pronunciation: |
Bertrandite + Pronunciation  |
| Synonym: |
ICSD 202360 |
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PDF 24-509 |
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