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Formula: Fe2+(SO4).6H2O
Hydrated sulphate, hexahydrite group
Crystal system: Monoclinic
Specific gravity: 1.934 calculated
Hardness: 2
Colour: Bluish green, colourless, white, light brownish
Solubility: Hygroscopic, soluble in water
Environments
Sedimentary environments
Hydrothermal environments
Localities
At Tatarstan, Russia, ferrohexahydrite was found as a dehydration product of
melanterite in drill cores from northeastern Tatarstan
(HOM).
At the type locality, the Sofiya Mine, Nikitovka Hg deposit, Gorlovka, Donetsk Oblast, Ukraine,
ferrohexahydrite occurs in oxidised ore-bearing sandstone
(HOM).
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