Black crystals of the extremely rare selenide-telluride mineral poubaite from the type locality and only one of the three known localities worldwide: Oldřichov (Ullersloh), Nejdek (Neudek), Krušné Hor, Bohemia, Czech Republic. Ex.F.Bauer collection. He bought the specimen to H.J.Wilke in the 90's. — Photo: David Hospital · CC BY-SA 4.0
Poubaite
Poubaite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula PbBi₂(Se,Te,S)₄.
It crystallizes in the hexagonal crystal system (space group R-3m). It is a member of the Tetradymite structural group.
Key properties: specific gravity 7.85; Metallic luster.
IMA symbol Pub, IMA status: approved, named in 1975.
Found in hydrothermal dolomite-calcite-quartz veins in the western contact of the Bor granite massif with gneisses and amphibolites, in association with a selenide-sulfide-telluride aggregate and uraninite (Oldřichov, Czech Republic).
It is found associated with Selenian rucklidgeite, several incompletely characterized new species (Oldřichov, Czech Republic); součekite, wittichenite (Otish Mountains deposit, Canada).
The name refers to Professor Zdenek Pouba (1902–1971), economic geologist, Charles University, Prague, Czech Republic.