Ilinskite
Ilinskite is an IMA-recognized mineral species in the halide class, with the chemical formula NaCu₅O₂(Se⁴⁺O₃)₂Cl₃.
It crystallizes in the orthorhombic crystal system (space group Pbnm).
Key properties: specific gravity 4.08; Pale green streak; Vitreous luster; optically biaxial.
IMA symbol Isk, IMA status: approved, named in 1996.
A rare volcanic sublimate around fumaroles.
It is found associated with Cotunnite, sofiite, halite, gold, tolbachite, melanothallite, chalcocyanite, burnsite, georgbokiite, chloromenite.
The mineral was named to honor Georgii Alekseevich Il’inskii (1927–1996), mineralogist, Saint Petersburg University, Saint Petersburg, Russia.
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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