praseodymium rare metallic element, 1885, coined in Modern Latin by discoverer Carl Auer von Welsbach (1858-1929) from Gk. prasios "leek-green" (from prason "leek") + didymos "double," the name given to an earth in 1840, so called because it was a "twin" to lanthana. When didymia was further analyzed in the 1880s, it was found to have several components, one of which was characterized by green salts and named accordingly, with the elemental suffix -ium.

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  • Praseodymium — (pronEng|ˌpreɪzioʊˈdɪmiəm or IPA|/ˌpreɪsioʊˈdɪmiəm/) is a chemical element that has the symbol Pr and atomic number 59. Characteristics Praseodymium is a soft silvery metal in the lanthanide group. It is somewhat more resistant to corrosion in… …   Wikipedia

  • Praseodymium — Pra se*o*dym i*um, n. [Praseo + didymium.] (Chem.) An elementary substance, one of the constituents of didymium; so called from the green color of its salts. Symbol Ps. Atomic weight 143.6. [1913 Webster] …   The Collaborative International Dictionary of English

  • praseodymium — Symbol: Pr Atomic number: 59 Atomic weight: 140.907 Soft silvery metallic element, belongs to the lanthanoids. Only natural isotope is Pr 141 which is not radioactive. Fourteen radioactive isotopes have been artificially produced. Used in rare… …   Elements of periodic system

  • praseodymium — [prā΄zē ō dim′ē əm, prā΄sēō dim′ē əm] n. [ModL < praseodymia, a rare earth (< Gr prasios: see PRASE) + ModL (di)dymium (see DIDYMIUM): so named (1885) by C. A. von Welsbach (1858 1929), Austrian chemist, from its spectroscopic line and from …   English World dictionary

  • praseodymium — /pray zee oh dim ee euhm, pray see /, n. Chem. a rare earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. [1880 85; < NL, equiv. to praseo (comb. form repr. Gk prásios… …   Universalium

  • praseodymium — prazeodimis statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Pr atitikmenys: lot. praseodymium angl. praseodymium rus. празеодим …   Chemijos terminų aiškinamasis žodynas

  • praseodymium — prazeodimis statusas T sritis fizika atitikmenys: angl. praseodymium vok. Praseodym, n rus. празеодим, m pranc. praséodyme, m …   Fizikos terminų žodynas

  • Praseodymium(III) chloride — Praseodymium(III) chloride …   Wikipedia

  • Praseodymium(III) sulfide — Chembox new Name = Praseodymium(III) sulfide OtherNames = Section1 = Chembox Identifiers CASNo = 12038 13 0 Section2 = Chembox Properties Formula = Pr2S3 MolarMass = 378.00 g/mol Appearance = brown powder rotten egg odor Density = 5.042 g/cm³,… …   Wikipedia

  • praseodymium — noun Etymology: New Latin, alteration of praseodidymium, irregular from Greek prasios, adjective + New Latin didymium didymium Date: 1885 a yellowish white metallic element of the rare earth group used especially in alloys and in the form of its… …   New Collegiate Dictionary

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