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Formula: Ca2Ca(AsO4)2.2H2O
Hydrated arsenate,
roselite group
Crystal System: Monoclinic
Specific gravity: 3.395 calculated for empirical formula, 3.405 calculated for ideal formula
Hardness: 3
Streak: White
Colour: White, pinkish, colourless
Luminescence: Does not fluoresce under either short wave or long wave UV
Environments
Dobšináite is a new mineral, approved in 2021 and to date (August 2022) reported only from the type locality.
Localities
At the type locality, the Dionýz mine, Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District,
Košice Region, Slovakia, dobšináite occurs in a supergene
assemblage formed by oxidation of primary
cobalt- and arsenic- bearing ore
minerals in a calcium-enriched environment under relatively dry conditions. It is found as white to pink clusters or
polycrystalline aggregates, up to 4 mm in size, consisting of densely intergrown, slightly rounded thin tabular to platy
crystals up to 0.1 mm across. Associated minerals include
picropharmacolite,
phaunouxite, gypsum,
erythrite and aragonite
(Mindat).
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