Chemical Formula:
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(Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2 |
Composition:
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Molecular Weight = 969.16 g |
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Hydrogen |
0.21 % |
H |
1.86 % |
H2O |
0.00 % |
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Oxygen |
39.62 % |
O |
0.00 % |
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0.00 % |
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Magnesium |
2.51 % |
Mg |
4.16 % |
MgO |
0.00 % |
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Silicon |
23.18 % |
Si |
49.60 % |
SiO2 |
0.00 % |
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Manganese |
5.67 % |
Mn |
7.32 % |
MnO |
0.00 % |
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Iron |
28.81 % |
Fe |
37.07 % |
FeO |
0.00 % |
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100.00 % |
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100.01 % |
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Empirical Formula:
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Fe2+5Mn2+MgSi8O22(OH)2 |
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Environment:
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Occurs in blocks of fayalite |
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Locality:
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Cheyenne Moutain area, El Paso County, Colorado, USA. Found in bedded Mn deposits at Yokoneyama, Tochigi Prefecture, Japan, and also in a pegmatite at Suishoyame, Fukushima Prefecture. Link to
MinDat.org
Location Data.
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Name Origin:
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The name indicates the structural relationship to protoamphiboles, and the compositional relationship to anthophyllite |
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Synonym:
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IMA1986-006 |
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