Pakhomovskyite
Pakhomovskyite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Co₃(PO₄)₂·8H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: Mohs hardness 2; specific gravity 2.71; Pink streak; Pearly (flakes) to dull luster; optically biaxial.
IMA symbol Phv, IMA status: approved, named in 2004.
A low-temperature hydrothermal mineral formed by reactions between primary minerals and alkaline phosphate fluids in dolomite carbonatite cutting phoscorites.
It is found associated with Bakhchisaraitsevite, bobierrite, magnetite, kovdorskite, rimkorolgite, juonniite, norsethite, chalcopyrite, phlogopite, pyrrhotite, pyrite.
The mineral was named to honor Yakov A. Pakhomovsky (b. 1948), a mineralogist of the Geological Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia.