Mineralogy Database

Protoferro-anthophyllite Mineral Data

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General Protoferro-anthophyllite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2
Help on Composition: Composition: Molecular Weight = 969.16 gm
   Magnesium   2.51 %  Mg    4.16 % MgO
   Manganese   5.67 %  Mn    7.32 % MnO
   Iron       28.81 %  Fe   37.07 % FeO
   Silicon    23.18 %  Si   49.60 % SiO2
   Hydrogen    0.21 %  H     1.86 % H2O
   Oxygen     39.62 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+5Mn2+MgSi8O22(OH)2
Help on Environment: Environment: Occurs in blocks of fayalite.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
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 Name Pronunciation: Name Pronunciation: Protoferro-anthophyllite + Pronunciation Say PROTOFERRO-ANTHOPHYLLITE
Help on Synonym: Synonym: IMA1986-006