ADAMSITE-(Y), A NEW SODIUM YTTRIUM CARBONATE MINERAL SPECIES FROM MONT SAINT-HILAIRE, QUEBEC

Abstract

Adamsite-(Y), ideally NaY(CO 3 ) 2 •6H 2 O, is a newly identified mineral from the Poudrette quarry, Mont Saint-Hilaire, Quebec.It occurs as groups of colorless to white and pale pink, rarely pale purple, flat, acicular to fibrous crystals.These crystals are up to 2.5 cm in length and form spherical radiating aggregates.Associated minerals include aegirine, albite, analcime, ancylite-(Ce),