Bilibinskite
A rare gold-copper-lead telluride named for Soviet geologist Yuri Bilibin, who studied the USSR's gold deposits.
Intro adapted from Wikipedia (CC BY-SA).
Bilibinskite is an IMA-recognized mineral species in the sulfide class, with the chemical formula PbAu₃Cu₂Te₂.
It crystallizes in the cubic crystal system.
Key properties: specific gravity 12.7; Gold-brown to brown streak; Semimetallic. R: n.d luster.
IMA symbol Bb, IMA status: approved, named in 1977.
Found in the zone of weathering of tellurium deposits.
It is found associated with Gold, bogdanovite, bezsmertnovite, belyakinite, other tellurides of Au, Cu, Pb, Fe (Aginsk deposit, Russia); sylvanite.
The name refers to Soviet geologist Yuri Aleksandrovich Bilibin (1901–1952), Karpkinskii All-Union Research Institute, St. Petersburg, Russia, specialist in gold deposits.