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yttriummore about yttrium

yttrium


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Yttrium  \Yt"tri*um\,  n.  [NL.,  from  Ytterby  in  Sweden.  See 
  {Erbium}.]  (Chem.) 
  A  rare  metallic  element  of  the  boron-aluminium  group  found 
  in  gadolinite  and  other  rare  minerals,  and  extracted  as  a 
  dark  gray  powder.  Symbol  Y.  Atomic  weight,  89.  [Written  also 
  {ittrium}.] 
 
  Note:  Associated  with  yttrium  are  certain  rare  elements,  as 
  erbium,  ytterbium,  samarium,  etc.,  which  are  separated 
  in  a  pure  state  with  great  difficulty.  They  are  studied 
  by  means  of  their  spark  or  phosphorescent  spectra. 
  Yttrium  is  now  regarded  as  probably  not  a  simple 
  element,  but  as  a  mixture  of  several  substances. 
 
  From  WordNet  r  1.6  [wn]: 
 
  yttrium 
  n  :  a  silvery  metallic  element  that  is  common  in  rare-earth 
  minerals;  used  in  magnesium  and  aluminum  alloys  [syn:  {Y}, 
  {atomic  number  39}] 
 
  From  Elements  database  20001107  [elements]: 
 
  yttrium 
  Symbol:  Y 
  Atomic  number:  39 
  Atomic  weight:  88.905 
  Silvery-grey  metallic  element  of  group  3  on  the  periodic  table.  Found  in 
  uranium  ores.  The  only  natural  isotope  is  Y-89,  there  are  14  other 
  artificial  isotopes.  Chemically  resembles  the  lanthanoids.  Stable  in  the 
  air  below  400  degrees,  celsius.  Discovered  in  1828  by  Friedrich  Wohler 
 
 




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