lutetium
lutetium
Symbol: Lu
Atomic number: 71
Atomic weight: 194.967
Silvery-white rare-earth metal which is relatively stable in air. It happens to be the most expensive rare-earth metal. Its found with almost all rare-earth metals, but is very difficult to separate from other elements. Least abundant of all natural elements. Used in metal alloys, and as a catalyst in various processes. There are two natural, stable isotopes, and seven radioisotopes, the most stable being Lu-174 with a half-life of 3.3 years. The separation of lutetium from ytterbium was described by Georges Urbain in 1907. It was discovered at approximately the same time by Carl Auer von Welsbach. The name comes from the Greek word lutetia which means Paris.

Elements of periodic system. 2013.

  • Lutetium — (pronEng|ljuːˈtiːʃiəm) is a chemical element with the symbol Lu and atomic number 71. A silvery white rare metal, lutetium is the heaviest member of the rare earth group.Parker, Sybil P., ed. Dictionary of Scientific and Technical Terms. 3rd ed.… …   Wikipedia

  • lutétium — ● lutétium ou lutécium nom masculin (de Lutèce, nom propre) Métal rare du groupe des lanthanides. (Élément chimique de symbole Lu, de numéro atomique 71 et de masse atomique 175, il a été isolé en 1907 par G. Urbain.) lutétium n. m. CHIM élément… …   Encyclopédie Universelle

  • lutetium — [lo͞o tē′shē əm] n. [ModL < lutetia, lutetium oxide (< L Lutetia: see LUTETIA) + IUM: so named by G. Urbain (1872 1938), Fr chemist, after his native city] a soft, silvery white chemical element, one of the rare earth elements and the last… …   English World dictionary

  • Lutetium — Lu*te ti*um, n. (Chem.) A metallic element separated from ytterbium in 1907, by Urbain in Paris and by von Welsbach in Vienna. It is a member of the Lanthanide rare earth group. Symbol, Lu; atomic number 71; atomic weight 174.967 [C=12.011].… …   The Collaborative International Dictionary of English

  • Lutetium — Eigenschaften …   Deutsch Wikipedia

  • lutetium — /looh tee shee euhm/, n. Chem. a trivalent rare earth element. Symbol: Lu; at. wt.: 174.97; at. no.: 71. Also, lutecium. [1905 10; < L Lutet(ia) Paris + IUM] * * * ▪ chemical element  (Lu), chemical element, rare earth metal of the lanthanoid… …   Universalium

  • Lutetium — Lu|te|ti|um 〈n.; s; unz.; chem. 〉 Element der Metalle der Seltenen Erden, Ordnungszahl 71 [nach Lutetia, lat. Name für Paris] * * * Lu|te|ti|um [lat. Lutetia = Paris; ↑ ium (1)]; das; s; chem. Symbol: Lu; veralteter Name: Cassiopeium; veraltetes… …   Universal-Lexikon

  • Lutetium — Lutécium Lutécium Ytterbium …   Wikipédia en Français

  • Lutétium — Lutécium Lutécium Ytterbium …   Wikipédia en Français

  • lutetium — liutecis statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Lu atitikmenys: lot. lutetium angl. lutecium rus. лютеций …   Chemijos terminų aiškinamasis žodynas