Lu Lutetium 71 174.967 6 d 71 1663.0 3402.0 [Xe] 6s2 4f14 5d1 2 8 18 32 9 2 9.84 0.000056% Silver Hexagonal 1.3 1.09 {"1":"523.5","2":"1340","3":"2022.3","4":"4370","5":"6445"} 524 50 3 1.75 17.8 18.6 355.0 0.15 16.4 0 Solid, Conductor, TransitionMetal, Metal, Stable, Natural loo-TEE-shi-em Silvery-white, hard, dense, rare earth metal. It has no practical applications. Found with ytterbium in gadolinite and xenotime. Usually obtained from monazite sand which is ofter 50% rare earth by weight and 0.003% lutetium. a5T1xXoR8XI Lutetium

Lanthanum was discovered in 1839 by Swedish chemist Carl Gustav Mosander.

He partially decomposed a sample of cerium nitrate by heating and treating the resulting salt with dilute nitric acid.

From the resulting solution, he obtained a pale brick colored oxide of the new rare earth.

Lanthanum was isolated in relatively pure form in 1923. From the Greek word lanthanein, to lie hidden 71 1907 Georges Urbain and Carl Auer von Welsbach France, Germany From the Greek word "Lutetia" meaning "Paris"

Lanthanum and its compounds are considered to be moderately toxic

Lanthanum is the most reactive of the rare earth metals

Lanthanum is used in large quantities in batteries for hybrid automobiles.

It is also used to make night vision goggles.

Small amounts of lanthanum, as an additive, can be used to produce nodular cast iron.

Lanthanum carbonate is used to reduce blood levels of phosphate in patients with kidney disease.