White rinkite-(Y) crystal aggregates from Canada ( Kipawa, Sheffield Lake, Les Lacs-du-Témiscamingue, Abitibi-Témiscamingue, Québec, Canada). Col. 2018 by R.Mielke. EDS by Pavel Kartashov. Ex. Erich Laskowski collection (USA). — Photo: David Hospital · CC BY 4.0
Rinkite-(Y)
Rinkite-(Y) is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₂Ca₄YTi(Si₂O₇)₂OF₃.
It crystallizes in the monoclinic crystal system (space group P2_1/c). It is a member of the Seidozerite-Rinkite structural group.
Key properties: Mohs hardness 5; specific gravity 3.44; White streak; Vitreous luster; optically biaxial.
IMA symbol Rin-Y, IMA status: approved, named in 2017.
Found in a pegmatite fragment from an alkaline massif collected from the moraine of the Darai-Pioz glacier.
It is found associated with Quartz, aegirine, microcline, neptunite, pectolite, calcite, eudialyte-group minerals, fluorite, titanite, turkestanite, kupletskite, galena, albite.
Identifies the Y-analog of rinkite-(Ce).