Adamsite-(Y) Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada FOV 3.3 x 2.4 mm This is a different spray on the same specimen. Some of the xls may look orthorhombic but I don't think there is any shomiokite-(Y) here. Of course they are often found together and without analysis one can't really be sure. — Photo: Modris Baum · Public domain
Adamsite-(Y)
Adamsite-(Y) (previously IMA 1999-020), chemical formula NaY(CO3)2·6H2O is a mineral of sodium, yttrium, carbon, oxygen, and hydrogen. It is named after Frank Dawson Adams (1859–1942), professor of geology, McGill University. Its Mohs scale rating is 3.
Intro adapted from Wikipedia (CC BY-SA).
Adamsite-(Y) is an IMA-recognized mineral species in the carbonate class, with the chemical formula NaY(CO₃)₂·6H₂O.
It crystallizes in the triclinic crystal system (space group P1).
Key properties: Mohs hardness 3; specific gravity 2.27; White streak; Vitreous to pearly luster; optically biaxial.
IMA symbol Ads-Y, IMA status: approved, named in 1999.
A rare late-stage, low-temperature hydrothermal mineral in an alkalic pegmatite dike in association with an intrusive alkalic gabbro-syenite complex.
It is found associated with Thomasclarkite-(Y), horváthite-(Y), donnayite-(Y), petersenite-(Ce), rhodochrosite.
The mineral was named to honor Professor Frank Dawson Adams (1859–1942), McGill University, Montreal, Canada, geologist and petrologist, who studied the Monteregian Hills.