Complete mineralogical data for FERROERICSSONITE. Chemical Formula: BaFe2+2Fe3+[Si2O7]O(OH). Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-FLUORO-LEAKEITE. Chemical Formula: NaNa2(Fe2+2Fe3+2Li)[Si8O22]F2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-HOLMQUISTITE. Chemical Formula: □Li2(Fe2+3Fe3+2)[Si8O22](OH)2. Crystal System: Orthorhombic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-HORNBLENDE. Chemical Formula: □Ca2(Fe2+4Fe3+)[Si7AlO22](OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-KATOPHORITE. Chemical Formula: Na(NaCa)(Fe2+4Fe3+)[Si7AlO22](OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-NYBØITE. Chemical Formula: NaNa2(Fe2+3Fe3+2)[Si7AlO22](OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-OBERTIITE. Chemical Formula: NaNa2(Fe2+3Fe3+Ti)[Si8O22]O2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERRO-FERRI-PEDRIZITE. Chemical Formula: NaLi2(Fe2+2Fe3+2Li)[Si8O22](OH)2. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for FERROFETTELITE. Chemical Formula: Ag16FeAs4S15. Crystal System: Monoclinic. Learn about its geologic occurrence, habit, and identification.

Complete mineralogical data for Ferrisymplesite. Chemical Formula: Fe3+3(AsO4)2(OH)3·5H2O. Crystal System: Amorphous. Learn about its geologic occurrence, habit, and identification.