Sinonimi: lutecium | Lu | atomic number 71
Silver-white, metallic element, the last of the lanthanide series, symbol Lu, atomic number 71, atomic weight 174.97. It is used in the “cracking”, or breakdown, of petroleum and in other chemical processes. It was named by its discoverer, French chemist Georges Urbain, (1872–1938) after his native city.
A trivalent metallic element of the rare earth group; usually occurs in association with yttrium; SYN. lutecium, Lu, atomic number 71.
Retki metal, retka zemlja.