Lanthanum: historical information

Lanthanum was discovered by Carl Gustaf Mosander at 1839 in Sweden. Origin of name: from the Greek word "lanthanein" meaning "to lie hidden".

Carl Gustav Mosander recognized the element lanthanum in impure cerium nitrate in 1839. His extraction resulted in the oxide lanthana (La2O3). A number of other lanthanides (rare-earths) were later discovered by identification of the impurities in yttrium and cerium compounds.

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lanthanum atomic number