neodymium
neodymium
Symbol: Nd
Atomic number: 60
Atomic weight: 144.24
Soft bright silvery metallic element, belongs to the lanthanoids. Seven natural isotopes, Nd-144 being the only radioactive one with a half-life of 10^10 to 10^15 years. Six artificial radioisotopes have been produced. The metal is used in glass works to color class a shade of violet-purple and make it dichroic. One of the more reactive rare-earth metals, quickly reacts with air. Used in some rare-earth alloys. Neodymium is used to color the glass used in welder's glasses. Neodymium is also used in very powerful, permanent magnets (Nd2Fe14B). Discovered by Carl F. Auer von Welsbach in Austria in 1885 by separating didymium into its elemental components praseodymium and neodymium. The name comes from the Greek words "neos didymos" which means "new twin". Neodymium should be considered highly toxic, however evidence would seem to show that it acts as little more than a skin and eye irritant. The dust however, presents a fire and explosion hazard.

Elements of periodic system. 2013.

  • Neodymium — Ne o*dym i*um, n. [NL. Dee {Neo }, and {Didymium}.] (Chem.) The chemical element of atomic number 60, one of the rare earth elements. Symbol Nd. Atomic weight 144.27. Note: It is a rare metallic element occurring in combination with cerium,… …   The Collaborative International Dictionary of English

  • neodymium — [nē΄ō dim′ē əm, nē΄ədim′ē əm] n. [ModL < neodymia, a rare earth (< Gr neos, NEW + ModL (di)dymium: see DIDYMIUM) + IUM: so named (1885) by C. A. von Welsbach (see WELSBACH BURNER), from being split from didymium] a silver colored chemical… …   English World dictionary

  • Neodymium — praseodymium ← neodymium → promethium ↑ Nd ↓ U …   Wikipedia

  • neodymium — /nee oh dim ee euhm/, n. Chem. a rare earth, metallic, trivalent element occurring with cerium and other rare earth metals, and having rose colored to violet colored salts. Symbol: Nd; at. wt.: 144.24; at. no.: 60; sp. gr.: 6.9 at 20°C. [1880 85; …   Universalium

  • neodymium — neodimis statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Nd atitikmenys: lot. neodymium angl. neodymium rus. неодим …   Chemijos terminų aiškinamasis žodynas

  • Neodymium — Eigenschaften …   Deutsch Wikipedia

  • neodymium — neodimis statusas T sritis fizika atitikmenys: angl. neodymium vok. Neodym, n rus. неодим, m pranc. néodyme, m …   Fizikos terminų žodynas

  • neodymium — noun Etymology: New Latin, from ne + dymium (from didymium) Date: 1885 a silver white to yellow metallic element of the rare earth group that is used especially in magnets and lasers see element table …   New Collegiate Dictionary

  • neodymium — noun a metallic chemical element (symbol Nd) with an atomic number of 60. See Also: didymium, praseodymium …   Wiktionary

  • neodymium — One of the rare earth elements; atomic no. 60, atomic wt. 144.24. [neo , new, + G. didymos, twin (of lanthanum)] * * * neo·dym·i·um .nē ō dim ē əm n a yellow metallic element of the rare earth group symbol Nd see ELEMENT …   Medical dictionary