White voggite from the TL and only known locality worldwide in Francon quarry (Francon Quarry, Québec, Canada). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Voggite
Voggite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Na₂Zr(PO₄)(CO₃)(OH)·2H₂O.
It crystallizes in the monoclinic crystal system (space group I2/m).
Key properties: specific gravity 2.7; White streak; Vitreous luster; optically biaxial.
IMA symbol Vog, IMA status: approved, named in 1988.
Very rare, in cavities in an altered amygdaloidal basalt dike intruding a zirconium-bearing silicocarbonatite sill in a limestone quarry.
It is found associated with Dawsonite, calcite, quartz.
The mineral was named to honor Adolf Vogg (1931–), Canadian amateur mineralogist who collected the original specimens.