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columbite

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columbite


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Columbite  \Co*lum"bite\,  n.  [Cf.  F.  colombite.  See  {Columbium}.] 
  (Min.) 
  A  mineral  of  a  black  color,  submetallic  luster,  and  high 
  specific  specific  gravity.  It  is  a  niobate  (or  columbate)  of 
  iron  and  manganese,  containing  tantalate  of  iron;  --  first 
  found  in  New  England. 
 
  From  WordNet  r  1.6  [wn]: 
 
  columbite 
  n  :  a  black  mineral  that  is  an  ore  of  niobium  and  tantalum  [syn: 
  {niobite}] 




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