Gungerite
Gungerite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula TlAs₅Sb₄S₁₃.
It crystallizes in the orthorhombic crystal system (space group Pbcn).
Key properties: Mohs hardness 2–2.5; specific gravity 4.173; Orange streak; Greasy luster.
IMA symbol Gng, IMA status: approved, named in 2020.
By late stage, low temperature, hydrothermal processes in limestone breccias composed of calcite and dolomite cemented by orpiment, pyrite, realgar, stibnite, baryte, quartz.
It is found associated with Bernardite, minerals of the chabournéite-dalnegroite and vorontsovite- ferrovorontsovite series, cinnabar, coloradoite, gold, greigite, hutchinsonite.
The mineral was named to honor Yuri Vladimirovich Gunger (b. 1961), a mining engineer, surveyor, historian, and authority on the Northern Urals.