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Ekmanite Mineral Data
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General Ekmanite Information
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 Chemical Formula: |
(Fe++,Mg,Mn,Fe+++)3(Si,Al)4O10(OH)2•2(H2O) |
| Composition: |
Molecular Weight = 440.08 gm |
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Magnesium 2.21 % Mg 3.66 % MgO |
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Manganese 3.75 % Mn 4.84 % MnO |
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Aluminum 6.13 % Al 11.58 % Al2O3 |
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Iron 16.50 % Fe 16.33 % FeO / 5.44 % Fe2O3 |
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Silicon 19.15 % Si 40.96 % SiO2 |
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Hydrogen 1.37 % H 12.28 % H2O |
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Oxygen 50.90 % O |
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______ ______ |
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100.00 % 95.09 % = TOTAL OXIDE |
| Empirical Formula: |
Fe2+Mg0.4Mn2+0.3Fe3+0.3Si3AlO10(OH)2�2(H2O) |
| Environment: |
Probably a Mn rich stilpnomelane. |
| IMA Status: |
Discredited Am. Min. 1954 - Valid Species (Pre-IMA) 1892 |
| Locality: |
Brunsjogruvan, Gryhytte, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Unknown. |
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