Yttrium

Yttrium
A rare elemental metal. A radioactive form of yttrium is used in radiation therapy and some types of immunotherapy.
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A metallic element, atomic no. 39, atomic wt. 88.90585. [Ytterby, village in Sweden]

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yt·tri·um 'i-trē-əm n a trivalent metallic element usu. included among the rare earth elements which it resembles chemically and with which it occurs in minerals symbol Y see ELEMENT (table)

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yt·tri·um (Y) (ĭґtre-əm) [from Ytterby, Sweden] a very rare metal, allied to cerium; atomic number, 39; atomic weight, 88.905.

Medical dictionary. 2011.

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  • Yttrium — (pronEng|ˈɪtriəm) is a chemical element with symbol Y and atomic number 39. It is a silvery metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. Yttrium is almost always… …   Wikipedia

  • Yttrium — Strontium ← Yttrium → Zirconium Sc …   Wikipédia en Français

  • YTTRIUM — De Ytterby, village de Suède. Symbole chimique: Y Numéro atomique: 39 Masse atomique: 88,905 g Point de fusion: 1 523 0C Point d’ébullition: 3 337 0C Densité (à 25 0C): 4,457 Élément chimique du groupe des terres rares, de couleur argentée,… …   Encyclopédie Universelle

  • Yttrium — Yt tri*um, n. [NL., from Ytterby, in Sweden. See {Erbium}.] (Chem.) A rare metallic element of the boron aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic number 39. Atomic weight …   The Collaborative International Dictionary of English

  • Yttrĭum — Yttrĭum, chemisches Zeichen Y, Äquiv. 32,2 (H = 1) od. 402,5 (O = 100), seltenes Metall. Der Chemiker Gadolin entdeckte 1794 in einem, im Feldspathe von Ytterby unsern Fahlun in Schweden vorkommenden schwarzen Minerale, dem Ytterbit (Gadolinit, s …   Pierer's Universal-Lexikon

  • Yttrĭum — Y, Metall, findet sich im Gadolinit und Yttrotitanit, als phosphorsaure Yttererde im Ytterspat (Xenotim, Castelnaudit, Wiserin), als Tantalat und Niobat im Yttrotantalit, als Silikat im Orthit etc., Atomgewicht 89, es verbrennt an der Luft zu… …   Meyers Großes Konversations-Lexikon

  • Yttrium — Y, Atomgew. 89, seltenes, im Gadolinit vorkommendes Metall. Das Yttriumoxyd Y2O3 ist neben Thoriumoxyd ein wesentlicher Bestandteil mancher Strümpfe für Auersches Gasglühlicht. Moye …   Lexikon der gesamten Technik

  • Yttrium — Yttrĭum (chem. Zeichen Y), seltenes Erdmetall vom Atomgewicht 89, kommt in den nordischen Mineralien Gadolinit, Orthit und Yttrotantalit vor; nach Abscheidung der Oxyde des Cers, Didyms und Lanthans gewinnt man aus den Rückständen die Yttererde …   Kleines Konversations-Lexikon

  • yttrium — Symbol: Y Atomic number: 39 Atomic weight: 88.905 Silvery grey metallic element of group 3 on the periodic table. Found in uranium ores. The only natural isotope is Y 89, there are 14 other artificial isotopes. Chemically resembles the… …   Elements of periodic system

  • yttrium — metallic rare earth element, 1866, coined in Modern Latin by Swedish chemist Carl Gustaf Mosander (1797 1858) from Ytterby, name of a town in Sweden where mineral containing it was found …   Etymology dictionary

  • yttrium — [i′trē əm] n. [ModL < YTTRIA + IUM: name proposed (1822) before isolation of the element by Mosander (see ERBIUM) in 1843] a rare, trivalent, silvery, metallic chemical element found in combination in gadolinite, monazite sand, samarskite, etc …   English World dictionary

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