Florensovite
Florensovite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu(Cr₁.₅Sb₀.₅)S₄.
It crystallizes in the cubic crystal system (space group Fd3m). It is a member of the Spinel structural group.
Key properties: Mohs hardness 5; specific gravity 4.28; Adamantine to metallic luster luster.
IMA symbol Frs, IMA status: approved, named in 1987.
Found in a granulite complex, in Cr- and V-rich metasediments.
It is found associated with Cuprian kalininite, uvarovite–goldmanite, karelianite–eskolaite, pyrite, ilmenite, pyrrhotite, magnesiochromite, chalcopyrite, franklinite, barite, apatite.
The mineral was named to honor Nikolai Aleksandrovich Florensov (1909–1986), Ukrainian geologist, Director of the Institute of the Earth’s Crust, Irkutsk, Russia.