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Formula: (NH4)2Fe2+(SO4)2.6H2O
Hydrated sulphate, picromerite group, forms a series with
boussingaultite
Crystal System: Monoclinic
Specific gravity: 1.800 to 1.862 measured, 1.838 calculated
Hardness: 2 to 2½
Colour: Pale green to colourless
Solubility: Soluble in water
Environments
Localities
At the type locality, Travale, Montieri, Grosseto Province, Tuscany, Italy, pale green incrustations of
Mohrite were collected from the fumeroles and geysers. They consisted of irregular laminae and of
minute quasi-euhedral crystals
(AM 50.805).
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