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Manganogrunerite Mineral Data
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General Manganogrunerite Information
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 Chemical Formula: |
[ ]Mn2Fe++5Si8O22(OH) |
| Composition: |
Molecular Weight = 999.80 gm |
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Manganese 10.99 % Mn 14.19 % MnO |
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Iron 27.93 % Fe 35.93 % FeO |
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Silicon 22.47 % Si 48.08 % SiO2 |
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Hydrogen 0.20 % H 1.80 % H2O |
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Oxygen 38.41 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+2Fe2+5(Si8O22)(OH)2 |
| Environment: |
Contact metamorphism of manganese rocks. Forms a series with manganocummintonite (tirolite). |
| IMA Status: |
Renamed IMA 1997, Formerly Dannemorite 1855 |
| Locality: |
Dannemora, Uppsala, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Renamed IMA 1997 as the Mn analog of grunerite, Formerly dannemorite (1855) which was named after its locality. |
| Name Pronunciation: |
Manganogrunerite  |
| Synonym: |
Dannemorite - Renamed |
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