Small tonnages of xenotime sand are recovered in association with Malaysian tin mining, etc . and are processed commercially.
12.
Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals ( dysprosium, ytterbium, erbium and gadolinium ).
13.
While xenotime may contain significant amounts of thorium or uranium, the mineral does not undergo metamictization like sphene or zircon would.
14.
Xenotime, a rare yttrium phosphate mineral whose chemical formula is YPO 4, was discovered in 1832 at Hidra ( Hitter?), Flekkefjord.
15.
This element is mined in China, the United States, Brazil, and India in form of the minerals monazite, euxenite, and xenotime.
16.
"' Xenotime "'is a O 4 ) and therefore may contain trace impurities of arsenic as well as silicon dioxide and calcium.
17.
These include peridot, aquamarine, topaz, ruby, emerald, rare-earth minerals bastnaesite and xenotime, sphene, tourmaline, and many varieties and types of quartz.
18.
Well-known minerals containing yttrium include gadolinite, xenotime, samarskite, euxenite, fergusonite, yttrotantalite, yttrotungstite, yttrofluorite ( a variety of fluorite ), thalenite, yttrialite.
19.
The rare earths dysprosium, erbium, terbium and ytterbium as well as metal elements such as thorium and uranium ( all replacing yttrium ) are the expressive secondary components of xenotime.
20.
This misspelt form was later explained as being from ????? ( stranger to ) and ???? ( honour ), supposedly referencing the small, rare and easily overlooked crystals that xenotime occurs as.
