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Nepheline Mineral Data
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General Nepheline Information
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 Chemical Formula: |
(Na,K)AlSiO4 |
| Composition: |
Molecular Weight = 146.08 gm |
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Potassium 6.69 % K 8.06 % K2O |
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Sodium 11.80 % Na 15.91 % Na2O |
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Aluminum 18.47 % Al 34.90 % Al2O3 |
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Silicon 19.23 % Si 41.13 % SiO2 |
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Oxygen 43.81 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.75K0.25Al(SiO4) |
| Environment: |
Silica-poor igneous rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1800 |
| Locality: |
Magnet Cove, Magnet Cove, Ouachita Mountains, Hot Spring County, Arkansas, USA. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek nephele, "cloud," because it becomes clouded when put in strong acid. |
| Name Pronunciation: |
Nepheline + Pronunciation  |
| Synonym: |
Elaeolite |
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ICSD 2937 |
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Nephelite |
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PDF 9-338 |
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