Chemical Formula: (Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2
Help on Composition: Composition: Molecular Weight = 969.16 g
 
Hydrogen 0.21 % H 1.86 % H2O 0.00 %
Oxygen 39.62 % O 0.00 % 0.00 %
Magnesium 2.51 % Mg 4.16 % MgO 0.00 %
Silicon 23.18 % Si 49.60 % SiO2 0.00 %
Manganese 5.67 % Mn 7.32 % MnO 0.00 %
Iron 28.81 % Fe 37.07 % FeO 0.00 %


100.00 % 100.01 %
 
Help on Empirical Formula: Empirical Formula: Fe2+5Mn2+MgSi8O22(OH)2
Help on Environment: Environment: Occurs in blocks of fayalite
Help on Locality: Locality: 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.
Help on Name Origin: Name Origin: The name indicates the structural relationship to protoamphiboles, and the compositional relationship to anthophyllite
Help on Synonym: Synonym: IMA1986-006