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Rittmannite Mineral Data
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General Rittmannite Information
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 Chemical Formula: |
Mn++Mn++Fe++Al2(OH)2(PO4)4•8(H2O) |
| Composition: |
Molecular Weight = 777.71 gm |
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Manganese 14.13 % Mn 18.24 % MnO |
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Aluminum 6.94 % Al 13.11 % Al2O3 |
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Iron 7.18 % Fe 9.24 % FeO |
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Phosphorus 15.93 % P 36.50 % P2O5 |
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Hydrogen 2.33 % H 20.85 % H2O |
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Oxygen 53.49 % O |
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______ ______ |
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100.00 % 97.94 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+2Fe2+Al2(OH)2(PO4)4•8(H2O) |
| Environment: |
Rare mineral in phosphatic nodules in zoned granite pegmatite veins. |
| IMA Status: |
Approved IMA 1989 |
| Locality: |
Mangualde pegmatite, near Mesquitela, and the Bendada pegmatite, near Guarda, Portugal. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Alfred Rittmann (1893-1980), German petrologist and volcanologist, University of Catania, Catania, Italy. |
| Name Pronunciation: |
Rittmannite + Pronunciation  |
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