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Piemontite Mineral Data
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General Piemontite Information
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 Chemical Formula: |
Ca2(Al,Mn,Fe)3(SiO4)3(OH) = Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) |
| Composition: |
Molecular Weight = 488.18 gm |
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Calcium 16.42 % Ca 22.97 % CaO |
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Manganese 10.13 % Mn 13.08 % MnO |
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Aluminum 9.95 % Al 18.80 % Al2O3 |
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Iron 3.43 % Fe 4.42 % FeO |
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Silicon 17.26 % Si 36.92 % SiO2 |
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Hydrogen 0.21 % H 1.85 % H2O |
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Oxygen 42.61 % O |
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______ ______ |
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100.00 % 98.03 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Al1.8Mn2+0.9Fe2+0.3(SiO4)3(OH) |
| Environment: |
Contact metamorphic rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1853 - Dana number changed from 58.2.1a.11 |
| Locality: |
Piedmont, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
| Name Pronunciation: |
Piemontite + Pronunciation  |
| Synonym: |
Piedmontite |
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