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Definitions of rare earth
Definition that contains rare earth
  • la a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
  • ho a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
  • er a trivalent metallic element of the rare earth group; occurs with yttrium
  • pm a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
  • lu a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
  • pr a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
  • eu a bivalent and trivalent metallic element of the rare earth group
  • nd a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
  • tb a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
  • dy a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic
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