Tags: Chemical Substance, Mineral.
Hisingerite is an iron(III) phyllosilicate mineral with formula Fe3+2Si2O5(OH)4·2H2O. A black or dark brown lustrous secondary mineral it is formed by the weathering or hydrothermal alteration of other iron silicate and sulfide minerals.It was first described in 1828 for an occurrence in Riddarhyttan Vastmanland Sweden.