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Medaite Mineral Data
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General Medaite Information
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 Chemical Formula: |
(Mn,Ca)6(V+++++,As)Si5O18(OH) |
| Composition: |
Molecular Weight = 827.82 gm |
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Calcium 0.97 % Ca 1.35 % CaO |
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Manganese 38.49 % Mn 49.70 % MnO |
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Vanadium 4.92 % V 8.79 % V2O5 |
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Silicon 16.96 % Si 36.29 % SiO2 |
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Arsenic 1.81 % As 2.78 % As2O5 |
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Hydrogen 0.12 % H 1.09 % H2O |
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Oxygen 36.72 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+5.8Ca0.2V5+0.8As0.2Si5O18(OH) |
| Environment: |
Formed at low temperatures and low H2O fugacity in veinlets cutting manganese ores. |
| IMA Status: |
Approved IMA 1980 |
| Locality: |
From the Molinello manganese mine, near Chiavari, Val Graveari, Val Graveglia, Liuria, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Dr. Francesco Meda (1926-1977), an amateur mineralogist from Turin, Italy. |
| Name Pronunciation: |
Medaite  |
| Synonym: |
ICSD 26908 |
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PDF 36-443 |
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