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Formula: Zn2(AsO4)(OH)
Anhydrous arsenate containing hydroxyl,
tarbuttite group, triclinic
paramorph of orthorhombic adamite,
zinc-bearing mineral
Crystal System: Triclinic
Specific gravity: 4.55 measured, 4.595 calculated
Hardness: 3½
Streak: White
Colour: Pale yellow
Luminescence: Specimens from the Ojuela Mine, Mapimi, Durango, Mexico, are not fluorescent under UV
Environments
Paradamite is a rare secondary mineral in the oxidised
zone of some hydrothermal polymetallic base-metal deposits
(HOM).
Localities
At the type locality, the Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico, paradamite was found as a
secondary mineral in the oxidised zone of the
silver-lead-zinc
mine (Webmin ). It occurred as sheaflike aggregates of crystals and as equant crystals up to 5 mm in size.
The paradamite was associated with mimetite and
adamite on a matrix of limonite.
Legrandite, plattnerite and
murdochite occur at the same locality (AM 41.958). Other associated
minerals include ojuelaite and
mapimite
(HOM).
At the Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia, paradamite is associated with
köttigite, adamite,
smithsonite, wulfenite and
chalcocite
(HOM).
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