Zlatogorite
Zlatogorite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula CuNiSb₂.
It crystallizes in the hexagonal crystal system (space group P-3m1). It is a member of the Nickeline structural group.
Key properties: Mohs hardness 3; specific gravity 5.15; Black streak; Metallic. Anisotropism: Strong, from light to dark gray with a faint greenish tint. R1 –R2: (400) —, (420) 38.6–44.3 luster.
IMA symbol Zla, IMA status: approved, named in 1994.
Found in hydrothermal veins.
It is found associated with Boulangerite, galena, diaphorite, argentian tetrahedrite, sphalerite.
The mineral was named to honor Academician Vladimı́r Zoubek, former Director of the Geological Survey and Geological Institute of the Czechoslovak Academy of Science, Prague, Czech Republic.