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Formula: Mn(SO4).6H2O
Hydrated sulphate of manganese,
hexahydrite group
Crystal system: Monoclinic
Specific gravity: 1.84 measured, 1.84 calculated
Hardness: 1½
Colour: White, pinkish, yellowish green
Solubility: Soluble in water
Environments
Localities
At Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, chvaleticeite is associated with
apjohnite, copiapite,
epsomite and gypsum
(HOM).
At the type locality, Chvaletice, Pardubice District, Pardubice Region, Czech Republic, chvaleticeite forms
white, relatively hard, fine-grained aggregates as well as pinkish to yellowish-green loose coatings. Grains do not
exceed 0.05 mm in longest dimension and are translucent with a vitreous lustre.
Chvaleticeite is a rare constituent of a sulphate-rich paragenesis within the oxidation zone of a
volcano-sedimentary deposit of
pyrite-manganese ores. It is
associated with magnesium-bearing and
manganese-bearing
melanterite,
epsomite, magnesium-bearing
and iron-bearing mallardite,
magnesium-bearing
jokokuite, magnesium-bearing
ilesite, rozenite,
copiapite and gypsum.
Chvaleticeite forms by dehydration of magnesium-bearing
mallardite, and dehydrates to
magnesium-bearing jokokuite
(AM 72.1023-1028).
Chvaleticeite from Chvaletice -
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