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- 🇬🇧 Lanthanum
- 🇺🇦 Лантан
- 🇨🇳 鑭
- 🇳🇱 Lanthaan
- 🇫🇷 Lanthane
- 🇩🇪 Lanthan
- 🇮🇱 לנתן
- 🇮🇹 Lantanio
- 🇯🇵 ランタン
- 🇵🇹 Lantânio
- 🇪🇸 Lantano
- 🇸🇪 Lantan
- 🇷🇺 Лантан
- 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.