Yakovenchukite-(Y)
Yakovenchukite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula K₃NaCaY₂Si₁₂O₃₀·4H₂O.
It crystallizes in the orthorhombic crystal system (space group Pcca).
Key properties: Mohs hardness 5; specific gravity 2.83; White streak; Vitreous luster; optically biaxial.
IMA symbol Yak-Y, IMA status: approved, named in 2006.
Found in voids in a thin (3.4 cm) sodalite-aegirine-microcline veinlet cutting ijolite-urtite.
It is found associated with Microcline, aegirine, calcite, catapleiite, donnayite-(Y), fluorapophyllite, fluorite, galena, lead, litharge, molybdenite, natrolite-gonnardite, pyrochlore.
The mineral was named to honor Victor Nesterovich Yakovenchuk (b. 1950), researcher at the Laboratory of Self- Organization in Mineral Systems, Geological Institute of the Kola Science Centre.