Sabinaite

sabinaite

dawsonite

weloganite

cryolite

Images

Formula: Na4TiZr2O4(CO3)4
Anhydrous carbonate, titanium- and zirconium- bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.36 measured, 3.48 calculated
Streak: White
Colour: Colourless to white
Luminescence: Not fluorescent, but aggregates are sometimes coated in films of a gibbsite-type mineral that has an intense, white fluorescence under long wave UV (Mindat)
Solubility: No reaction in dilute and concentrated (1:1) hydrochloric acid at room temperature, but is readily soluble with effervescence in warm hydrochloric acid
Environments

Carbonatites

Localities

At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, sabinaite occurs with albite, microcline, dawsonite, analcime, sodalite, pectolite, dolomite and aegirine in cavities in the sodalite syenite associated with an intrusive alkalic gabbro - syenite complex (CM 23.17-19, HOM).

At the type locality, the Francon quarry, Montréal, Québec, Canada, dawsonite-bearing silicocarbonatite sills exposed in a limestone quarry contain a varied mineralogy that includes several unique barium- and zirconium- bearing carbonates (CM 18.25-29). Sabinaite is associated with calcite, dawsonite, weloganite, cryolite, pyrite, galena, baryte, ilmenorutile, ankerite, siderite and quartz (HOM).

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