Gadolinium
Gadolinium is named for gadolinite, a mineral named for Gadolin, a Finnish chemist and was discovered in 1886. Gadolinium is found along with the other rare-earth minerals principally in monazite and bastnasite. The metal is isolated using ion exchange and solvent extraction methods. Gadolinium, like the other rare-earth metals, has a bright silver luster and is malleable and ductile. Gadolinium is widely used as a phosphor activator in color tv tubes. It is also used as an alloying agent to provide high temperature and oxidation resistance.