Auerbakhite
Auerbakhite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula MnTl₂As₂S₅.
It crystallizes in the orthorhombic crystal system (space group Cmca).
Key properties: specific gravity 5.245; Adamantine luster.
IMA symbol Aue, IMA status: approved, named in 2020.
Formed by complex hydrothermal-metasomatic processes with successive telescoping of ore mineral assemblages in breccias, developed in limestones and volcanic-sedimentary rocks, cemented by realgar, orpiment, and pyrite.
It is found associated with Alabandite, bernardite, christite, cinnabar, coloradoite, dalnegroite, gillulyite, gold, hutchinsonite, imhofite, lorándite, metacinnabar, philrothite.
The mineral was named to honor Russian mining engineer, manufacturer.