in Hainite-(Y) and Batievaite-(Y), Two Rinkite-Group Minerals from the Sakharjok Massif, Keivy Alkaline...rare earths, copper, phosphorus, niobium, platinum-group elements, and other critical metals. The continued...rare earths, copper, phosphorus, niobium, platinum-group elements, and other critical metals. The continuing...[5]. The region is also famous for its platinum-group-element (PGE) deposits, which are investigated by...ores from the Udokan (Russia) and Talvivaara (Finland) deposits, as well as technogenic waste dumps such |