Yttrium ingots. Image copyright: smart-elements.com.
Yttrium is a silvery-white rare-earth element of group III of the periodic table; it is used in alloys and as a "getter" to help evacuate electron tubes. First isolated in 1828, yttrium is found in monzate sand, bastnaesite, and gadolinite; it was also found in lunar rock samples collected by the Apollo 11 mission.
The commonest isotope of yttrium is 89Y (100%). Yttrium-90 is an artificial radioactive isotope used in radiotherapy.
|relative atomic mass||88.906|
|melting point||1,523°C (2,773°F)|
|boiling point||3,337°C (6,039°F)|