Anatolyite
Anatolyite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Na₆(Ca,Na)(Mg,Fe³⁺)₃Al(AsO₄)₆.
It crystallizes in the hexagonal crystal system (space group R-3c). It is a member of the Yurmarinite structural group.
Key properties: Mohs hardness 4.5; specific gravity 3.872; White streak; Vitreous luster; optically uniaxial.
IMA symbol Aly, IMA status: approved, named in 2016.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Potassic feldspar, hematite, tenorite, cassiterite, johillerite, tilasite, ericlaxmanite, lammerite, arsmirandite, sylvite, halite, aphthitalite, langbeinite.
The mineral was named to honor Russian crystallographer, mineralogist, and mathematician Anatoly Kapitonovich Boldyrev (1883-1946) Professor of Crystallography and Mineralogy.