Sabinaite (Na 4(C. It crystallizes in the monoclinic as colorless to white prisms within cavities. It is more typically found as powdery coatings and masses. It has a specific gravity of 3.36.
It has been found in vugs sill and within sodalite in the alkali intrusion at Mont Saint-Hilaire.
It was first described in 1980 for an occurrence in the Francon quarry, Montreal Island. It is named after Ann Sabina (1930–2015), a mineralogist working for the Geological Survey of Canada.