Mckelveyite-(Y) : NaCaBa3Y(CO3)6·3H2O
Donnayite-(Y) : NaCaSr3Y(CO3)6·3H2O
As recorded:
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Photo added to mindat.org
“A 3mm xl of donnayite-Y with syntactic growths of mckelveyite-Y. JBS specimen and photo.”
Jason B. Smith - 30th November 2000
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