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holmium

Definitions

  • A relatively soft, lustrous, malleable rare-earth element, with unusual magnetic properties including the highest magnetic moment of any naturally occurring element, found in gadolinite, monazite, and other rare-earth minerals. Atomic number 67; atomic weight 164.930; melting point 1,462°C; boiling point 2,700°C; specific gravity 8.795; valence 3. cross-reference: Periodic Table. noun  ☝️ Source: The American Heritage Dictionary of the English Language, 5th Edition  (view on wordnik.com)
  • Chemical symbol, Ho. A certain substance whose chemical properties have not been investigated, but which is assumed to be an elementary substance. noun  ☝️ Source: The Century Dictionary  (view on wordnik.com)
  • A rare element of atomic number 67 said to be contained in gadolinite. Chemical symbol Ho. Atomic weight 164.93. Valence +3. It was detected by spectral absorption bands in 1878 by the Delafontaine and Soret, who called it "Element X". Later the Swedish chemist Cleve independently discovered it in erbia, and named it after his native city Stockholm. The first preparation of pure Holmia, the yellow oxide, was not made until 1911. noun  ☝️ Source: The GNU version of the Collaborative International Dictionary of English  (view on wordnik.com)
  • A metallic chemical element (symbol Ho) with an atomic number of 67. noun  ☝️ Source: Wiktionary  (view on wordnik.com)
  • a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds noun  ☝️ Source: WordNet 3.0  (view on wordnik.com)

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Etymology

  • rare earth element, named by French chemist Lecoq de Boisbaudran (1838-1912) in 1886, from holmia "holmium oxide," name of an earth identified and named in Modern Latin by the earth's discoverer, Swedish chemist Per Teodor Cleve (1840-1905), in 1879 from Holmia, Latin name of Stockholm. With metallic element ending -ium. Holmia was isolated from erbia, the Scandinavian earth which also yielded thulium, scandium, and ytterbium.1838, 1840, 1879, 1886, 1905, 1912

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