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Jeffreyite Mineral Data
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General Jeffreyite Information
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 Chemical Formula: |
(Ca,Na)2(Be,Al)Si2(O,OH)7 |
| Composition: |
Molecular Weight = 255.30 gm |
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Sodium 4.50 % Na 6.07 % Na2O |
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Calcium 23.55 % Ca 32.95 % CaO |
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Beryllium 2.65 % Be 7.35 % BeO |
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Aluminum 2.64 % Al 4.99 % Al2O3 |
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Silicon 22.00 % Si 47.07 % SiO2 |
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Hydrogen 0.79 % H 7.06 % H2O |
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Oxygen 43.87 % O |
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______ ______ |
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100.00 % 105.48 % = TOTAL OXIDE |
| Empirical Formula: |
Ca1.5Na0.5Be0.75Al0.25Si2O5(OH)2 |
| Environment: |
In a cavity in a highly calcium-metasomatized granite dike. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Jeffrey mine, Asbestos, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Jeffreyite + Pronunciation  |
| Synonym: |
IMA1982-075 |
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