Badalovite
Badalovite is an IMA-recognized mineral species in the arsenate class, with the chemical formula NaNaMg(MgFe³⁺)(AsO₄)₃.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Alluaudite structural group.
Key properties: Mohs hardness 3.5; specific gravity 4.016; White to pale greenish or pale yellowish streak; Vitreous luster; optically biaxial.
IMA symbol Bdl, IMA status: approved, named in 2016.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Hematite, tenorite, cassiterite, johillerite, nickenichite, calciojohillerite, bradaczekite, metathénardite, aphthitalite, langbeinite, calciolangbeinite.
The mineral was named to honor mineralogist and geochemist Stepan Tigranovich Badalov (1919-2014), Abdullaev Institute of Geology and Geophysics, Uzbekistan Academy of Sciences, Tashkent.