Lanthanum is a chemical element wi the seembol La an atomic nummer 57. Lanthanum is a siller white metallic element an is the first element o the lanthanide series. It is foond in some rare-yird minerals, uisually in combination wi cerium an ither rare yird elements. Lanthanum is a malleable, ductile, an saft metal that oxidises rapidly whan exposed tae air. It is produced frae the minerals monazite an bastnäsite uisin a complex multistage extraction process. Lanthanum compoonds hae hantle applications as catalysts, additives in gless, carbon lichtin for studio lichtin an projection, igneetion elements in lichters an torches, electron cathodes, scintillators, an ithers. Lanthanum carbonate (La2(CO3)3) haes been approved as a medicine for treatin renal failur.