Lanthanum: historical information
- Discoveror: Carl Gustaf Mosander
- Place of discovery: Sweden
- Date of discovery: 1839
- 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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