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Norrishite Mineral Data
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General Norrishite Information
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 Chemical Formula: |
K(Mn+++2Li)Si4O10(O)2 |
| Composition: |
Molecular Weight = 460.25 gm |
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Potassium 8.50 % K 10.23 % K2O |
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Lithium 1.51 % Li 3.25 % Li2O |
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Manganese 23.87 % Mn 34.30 % Mn2O3 |
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Silicon 24.41 % Si 52.22 % SiO2 |
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Oxygen 41.71 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KMn3+2LiSi4O12 |
| Environment: |
Major to minor component of manganiferous schists, formed through metamorphism of a stratiform manganese deposit. Resembles biotite. |
| IMA Status: |
Approved IMA 1989 |
| Locality: |
Hoskins mine, three km west of Grenfell, New South Wales, Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Keith Norrish of the Division of Soils, Commonwealth Scientific and Industrial Research Organization, Australia. |
| Name Pronunciation: |
Norrishite + Pronunciation  |
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