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Protomangano-ferro-anthophyllite Mineral Data
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General Protomangano-ferro-anthophyllite Information
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 Chemical Formula: |
(Mn++,Fe++)2(Fe++,Mg)5(Si4O11)2(OH)2 |
| Composition: |
Molecular Weight = 969.16 gm |
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Magnesium 2.51 % Mg 4.16 % MgO |
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Manganese 5.67 % Mn 7.32 % MnO |
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Iron 28.81 % Fe 37.07 % FeO |
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Silicon 23.18 % Si 49.60 % SiO2 |
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Hydrogen 0.21 % H 1.86 % H2O |
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Oxygen 39.62 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+Fe2+5MgSi8O22(OH)2 |
| Environment: |
Bedded Mn deposit at Yokoneyama. At the Suishoyama pegmatite the mineral is mixed with clinoamphiboles. |
| IMA Status: |
Approved IMA 1986 (Dana # Added) |
| Locality: |
Yokoneyama, Tochigi Prefecture, Japan. Siushoyama, Fukushima Prefecture, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
The name indicates the structural relationship to protoamphiboles, and the compositional relationship to protoferro-anthophyllite and anthophyllite. |
| Name Pronunciation: |
Protomangano-ferro-anthophyllite + Pronunciation 
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| Synonym: |
IMA1986-007 |
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