Heyrovskýite , Quartz Locality: Rakovník (Rakonitz), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic Dimensions: 50 mm x 43 mm x 32 mm; Weight: 54 g Description: Silvery-bright heyrovskýite crystals in quartz. — Photo: Marc Gravel · Public domain
Heyrovskýite
Heyrovskýite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Pb₆Bi₂S₉.
It crystallizes in the orthorhombic crystal system (space group Bbmm). It is a member of the Lillianite structural group.
Key properties: specific gravity 7.17; Grayish black streak; Metallic, tarnishes black luster.
IMA symbol Hyv, IMA status: approved, named in 1970.
Found in high-temperature quartz veins.
It is found associated with Pyrite, sphalerite, galena, molybdenite, cosalite, bismuth, galenobismutite, chalcopyrite, covellite, bursaite, arsenopyrite, siderite, quartz, albite.
In honor of Jaroslav Heyrovský (1890–1967), Czech Nobel Laureate in chemistry.