Geversite
Geversite is an IMA-recognized mineral species in the sulfide class, with the chemical formula PtSb₂.
It crystallizes in the cubic crystal system (space group Pa3). It is a member of the Pyrite structural group.
Key properties: Mohs hardness 4.5–5; specific gravity 10.97; Metallic. R: (400) 58.9, (420) 59.1, (440) 59.3, (460) 59.4, (480) 59.4, (500) 59.4, (520) 59.2, (540) 58.9 luster.
IMA symbol Gev, IMA status: approved, named in 1961.
Found in concentrates of platinum minerals derived from Pt–Fe–Ni–Cu deposits in ultramafic rocks (Driekop mine, South Africa).
It is found associated with Platinum, gold, hollingworthite, sperrylite, stibiopalladinite, chalcopyrite, pyrrhotite (Driekop mine, South Africa); vozhminite, heazlewoodite, tučekite.
In honor of Professor Traugott Wilhelm Gevers (1900–1991), University of the Witswatersrand, Johannesburg, South Africa, eminent South African geologist.