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Psilomelane Mineral Data
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General Psilomelane Information
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 Chemical Formula: |
(Ba,H2O)2Mn5O10 |
| Composition: |
Molecular Weight = 590.03 gm |
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Barium 23.27 % Ba 25.99 % BaO |
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Manganese 46.56 % Mn 66.89 % Mn2O3 |
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Hydrogen 0.34 % H 3.05 % H2O |
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Oxygen 29.83 % O |
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______ ______ |
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100.00 % 95.93 % = TOTAL OXIDE |
| Empirical Formula: |
Ba•(H2O)Mn3+5O10 |
| Environment: |
General term for hard, black Mn oxides. Romanechite is one of the most common species. |
| IMA Status: |
Discredited IMA 1982 |
| Locality: |
Common world wide. Link to MinDat.org Location Data. |
| Name Origin: |
Named in 1758 from the Greek psilos - "smooth" and melas - "black." |
| Name Pronunciation: |
Psilomelane + Pronunciation  |
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