Evseevite
Evseevite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Na₂Mg(AsO₄)F.
It crystallizes in the orthorhombic crystal system (space group Pbcn). It is a member of the Moraskoite structural group.
IMA symbol Evs, IMA status: approved, named in 2019.
It is found associated with Distribution From the Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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