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Selwynite Mineral Data
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General Selwynite Information
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 Chemical Formula: |
NaK(Be,Al)Zr2(PO4)4•2(H2O) |
| Composition: |
Molecular Weight = 673.96 gm |
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Potassium 5.80 % K 6.99 % K2O |
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Sodium 3.41 % Na 4.60 % Na2O |
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Zirconium 27.07 % Zr 36.57 % ZrO2 |
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Beryllium 1.00 % Be 2.78 % BeO |
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Aluminum 1.00 % Al 1.89 % Al2O3 |
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Phosphorus 18.38 % P 42.12 % P2O5 |
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Hydrogen 0.60 % H 5.35 % H2O |
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Oxygen 42.73 % O |
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______ ______ |
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100.00 % 100.30 % = TOTAL OXIDE |
| Empirical Formula: |
NaKBe0.75Al0.25Zr2(PO4)4•2(H2O) |
| Environment: |
In pegmatitic cavities. |
| IMA Status: |
Approved IMA 1995 |
| Locality: |
A granite quarry near Wycheproof, NW Victoria, Australia. Link to MinDat.org Location Data. |
| Name Origin: |
For A. R. C. Selwyn (1824-1902), founding director of the Geological Survey of Victoria, Australia. |
| Name Pronunciation: |
Selwynite + Pronunciation  |
| Synonym: |
IMA1993-037 |
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