Michalskiite
Michalskiite is an IMA-recognized mineral species in the vanadate class, with the chemical formula Cu²⁺Mg₃Fe³⁺₃.₃₃(VO₄)₆.
It crystallizes in the orthorhombic crystal system (space group Pmcn). It is a member of the Lyonsite structural group.
Key properties: Mohs hardness 3.5; specific gravity 3.848; Light orange streak; Adamantine luster; optically biaxial.
IMA symbol Mcs, IMA status: approved, named in 2019.
Secondary alteration product probably formed at low temperature under oxidizing conditions in a uranium deposit.
It is found associated with Arcanite, epsomite, hematite, syngenite, quartz, K-feldspar, mica. Distribution From the dump of the Lichtenberg open pit, Ronneburg mining district.
The mineral was named to honor German mineral collector and dealer Dipl. Min. Steffen Michalski (b. 1974), who discovered this mineral and provided the studied material.