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Formula: Ni2[AsO3(OH)]2(H2O)5
Arsenate, nickel-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.993 calculated
Hardness: 3
Streak: Pale pink
Colour: Pale pink (some with purplish or violet tints), colour is due to high
cobalt content
Luminescence: No fluorescence under short wave or long wave UV
Environments
Localities
At the type locality, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, honzaite, a
supergene mineral, occurs in the
silver + arsenic +
cobalt + nickel +
bismuth and uranium vein-type
hydrothermal mineral deposit, associated with arsenolite,
zeunerite, nickel-rich
burgessite and a red amorphous
cobalt – nickel –
copper arsenate phase. The
honzaite forms pale pink irregular to hemispherical microcrystalline aggregates up to 5 mm across on
strongly weathered ore gangue. Tiny prismatic crystals, up to 30 μm long,
are observed rarely on the surface of these aggregates.
Honzaite forms during weathering of primary
nickelskutterudite and
tennantite under strongly acidic conditions.
(EJM 30.5.989-997).
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