Ytterbium

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ytterbium \Yt*ter"bi*um\, n. [NL., fr. Ytterby, in Sweden. See
     {Erbium}.] (Chem.)
     A rare element of the boron group, sometimes associated with
     yttrium or other related elements, as in euxenite and
     gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf.
     {Yttrium}.


     [1913 Webster]
  
     Note: Ytterbium is associated with other rare elements, and
           probably has not been prepared in a pure state.
           [1913 Webster]

From WordNet (r) 2.0 [wn]:

  ytterbium
       n : a soft silvery metallic element; a rare earth of the
           lanthanide series; it occurs in gadolinite and monazite
           and xenotime [syn: {Yb}, {atomic number 70}]

From Elements database 20001107 [elements]:

  ytterbium
  Symbol: Yb
  Atomic number: 70
  Atomic weight: 173.04
  Silvery metallic element of the lanthanoids. Seven natural isotopes and
  ten artificial isotopes are known.  Used in certain steels. Discovered by
  J.D.G. Marignac in 1878.