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Eudidymite Mineral Data
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General Eudidymite Information
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 Chemical Formula: |
NaBeSi3O7(OH) |
| Composition: |
Molecular Weight = 245.26 gm |
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Sodium 9.37 % Na 12.64 % Na2O |
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Beryllium 3.67 % Be 10.20 % BeO |
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Silicon 34.35 % Si 73.49 % SiO2 |
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Hydrogen 0.41 % H 3.67 % H2O |
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Oxygen 52.19 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaBe(Si3O7)(OH) |
| Environment: |
A late-stage mineral in alkalic nepheline syenite pegmatites. |
| IMA Status: |
Valid Species (Pre-IMA) 1887 |
| Locality: |
Island Ovre-Aro, Langesundfiord, Norway. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek for well and twinned, in allusion to its common occurrence in twins. |
| Name Pronunciation: |
Eudidymite + Pronunciation  |
| Synonym: |
ICSD 26001 |
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PDF 14-201 |
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