Mineralogy Database

Fayalite Mineral Data

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General Fayalite Information

Help on Chemical  Formula: Chemical Formula: Fe++2SiO4
Help on Composition: Composition: Molecular Weight = 203.78 gm
   Iron     54.81 %  Fe   70.51 % FeO
   Silicon  13.78 %  Si   29.49 % SiO2
   Oxygen   31.41 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2(SiO4)
Help on Environment: Environment: Ultra mafic silica-poor igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1840
Help on Locality: Locality: Fayal Island, Azores Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Fayalite Say FAYALITE
Help on Synonym: Synonym: Hortonolite - Mn,Mg
  ICSD 26375
  PDF 31-633