Hisingerite

Hisingerite is a mineral, an iron silicate, formula Fe³⁺₂Si₂O₅(OH)₄·2H₂O. A black or dark brown lustrous secondary mineral, it is formed by the weathering of other iron silicates and sulfides.[1]

It was first described in 1828 for an occurrence in Riddarhyttan, Vastmanland, Sweden. It was named after Wilhelm Hisinger (1766-1852), a Swedish chemist.[2]

There is also an aluminian hisingerite variety in which one of the iron atoms is replaced by aluminium.[3]

References

1. ^ http://www.handbookofmineralogy.org/pdfs/Hisingerite.PDF Handbook of Mineralogy
2. ^ http://www.webmineral.com/data/Hisingerite.shtml Webmineral
3. ^ http://www.mindat.org/min-11191.html Mindat

List of minerals