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Eggletonite Mineral Data
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General Eggletonite Information
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 Chemical Formula: |
Na2Mn8[Si11AlO29](OH)7•11(H2O) |
| Composition: |
Molecular Weight = 1,602.61 gm |
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Sodium 2.87 % Na 3.87 % Na2O |
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Manganese 27.42 % Mn 35.41 % MnO |
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Aluminum 1.68 % Al 3.18 % Al2O3 |
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Silicon 19.28 % Si 41.24 % SiO2 |
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Hydrogen 1.82 % H 16.30 % H2O |
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Oxygen 46.92 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na2Mn2+8Si11AlO29(OH)7•11(H2O) |
| Environment: |
Miarolitic cavities in nepheline syenite. Probably isostructural with ganophyllite. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Big Rock Quarry, Little Rock, Pulaski County, Arkansas, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for R. A. Eggleton, Australian National University. |
| Name Pronunciation: |
Eggletonite + Pronunciation  |
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