Polkanovite
Polkanovite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Rh₁₂As₇.
It crystallizes in the hexagonal crystal system (space group P6_3/m).
Key properties: specific gravity 10.2; Metallic luster.
IMA symbol Pkv, IMA status: approved, named in 1997.
Found in the 0.05-1.5 mm fraction of gold-PGM-placer heavy-mineral concentrate in a river draining chromite-mineralized ophiolitic complexes (Russia). Detrital (South Africa).
It is found associated with Isoferroplatinum, tulameenite, native ruthenium, cherepanovite, irarsite, palladodymite, sperrylite, miassite (Russia).
The mineral was named to honor Yuriy Aleksandrovich Polkanov (b. 1935), Institute of Mineral Resources, Academy of Technical Sciences, Ukraine.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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