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Formula: PbBi2(Se,Te,S)4
Sulphosalt, aleksite group, lead-,
bismuth-, selenium- and
tellurium- bearing mineral
Crystal System: Trigonal
Specific gravity: 7.85 calculated
Hardness: 2½ to 3
Colour: In polished section, creamy white
Common impurities: Cu
Environments
Localities
At the Otish Mountains U deposit, Otish Mountains, Baie-James, Jamésie, Nord-du-Québec, Québec, Canada, poubaite
occurs in the vein-type uranium deposit with other
tellurides and selenides, including
součekite and wittichenite
(HOM).
At the type locality, Oldřichov, Tachov, Tachov District, Plzeň Region, Czech Republic, poubaite occurs in
hydrothermal dolomite - calcite -
quartz veins in the western contact of a
granite massif with gneisses
and amphibolites, associated with a
selenide - sulphide - telluride
aggregate and uraninite. Associated minerals include
selenium-rich rucklidgeite
(HOM).
The poubaite occurs in euhedral to subhedral lath-like crystals 30-40 microns, rarely up to 80 microns, long,
8-10 microns thick, generally in galena -
clausthalite veinlets in calcite
(AM 63.1282-1284).
Poubaite from Oldřichov - Image
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