thulium
thulium
Symbol: Tm
Atomic number: 69
Atomic weight: 168.934
Soft grey metallic element that belongs to the lanthanoids. One natural isotope exists, Tm-169, and seventeen artificial isotopes have been produced. No known uses for the element. Discovered in 1879 by Per Theodor Cleve.

Elements of periodic system. 2013.

  • Thulium — (pronEng|ˈθjuːliəm) is a chemical element that has the symbol Tm and atomic number 69. A lanthanide element, thulium is the least abundant of the rare earths. It is an easily workable metal with a bright silvery gray luster and can be cut by a… …   Wikipedia

  • Thulium — Erbium ← Thulium → Ytterbium …   Wikipédia en Français

  • thulium — [ tyljɔm ] n. m. • 1904; lat. sc., nom donné par le chimiste suéd. Clève, du lat. Thule, gr. Thoulê, nom de la Scandinavie ♦ Chim. Élément atomique (Tm; no at. 69; m. at. 168,93), métal blanc argenté, du groupe des terres rares, utilisé dans la… …   Encyclopédie Universelle

  • Thulium — Thu li*um, n. [NL. See {Thule}.] (Chem.) A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite. [1913 Webster] [1913 Webster] …   The Collaborative International Dictionary of English

  • Thulium — Thu, Atomgew. 169,65, chemisches Element, in einigen norwegischen seltenen Mineralien vorkommend, so im Gadolinit, auch im Samarskit von Nordkarolina. Bujard …   Lexikon der gesamten Technik

  • thulium — [tho͞o′lē əm, thyo͞o′lē əm] n. [ModL: so named (1886) by L. de Boisbaudran (see GADOLINIUM) < THULIA (from which it was isolated by Cleve in 1879) + IUM] a bright, silvery chemical element, one of the rare earth elements: symbol, Tm; at. no.,… …   English World dictionary

  • Thulium — Eigenschaften …   Deutsch Wikipedia

  • thulium — /thooh lee euhm/, n. Chem. a rare earth metallic element found in the minerals euxenite, gadolinite, etc. Symbol: Tm; at. wt.: 168.934; at. no.: 69; sp. gr.: 9.32. [1875 80; < NL; see THULE, IUM] * * * ▪ chemical element  (Tm), chemical element,… …   Universalium

  • Thulium — Thu|li|um 〈n.; s; unz.; chem. 〉 chem. Element, Metall aus der Gruppe der Lanthanoide, Ordnungszahl 69 [nach dem nord. Sagenland Thule] * * * Thu|li|um [nach Thule, einem sagenhaften Land im fernen Norden; ↑ ium (1)], das; s; Symbol: Tm: chem.… …   Universal-Lexikon

  • Thulium — tulis statusas T sritis fizika atitikmenys: angl. thulium vok. Thulium, n rus. тулий, m pranc. thulium, m …   Fizikos terminų žodynas