Mohrite

Mohrite
A close up of the yellowish microcrystals of the mohrite mineral
General
CategoryMinerals
FormulaNH4)2Fe(SO4)2·6 H2O

Mohrite, (NH4)2Fe(SO4)2·6 H2O, is a rare ammonium iron(II) sulfate mineral originally found in the geothermal fields of Tuscany, Italy. This Fe-dominant analogue of boussingaultite is sometimes reported from burning coal dumps where it is a product of pyrite oxidation.

The mineral crystallizes in the monoclinic crystal system with space group P21/a.

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