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niobium |
4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Niobium \Ni*o"bi*um\, n. [NL., fr L. & E. {Niobe}.] (Chem.) A later name of columbium. See {Columbium}. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Columbium \Co*lum"bi*um\, n. [NL., fr Columbia America.] (Chem.) A rare element of the vanadium group first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb Now more commonly called {niobium}. From WordNet r 1.6 [wn]: niobium n : a soft gray ductile metallic element used in alloys; occurs in niobite; formerly called columbium [syn: {Nb}, {atomic number 41}] From Elements database 20001107 [elements]: niobium Symbol: Nb Atomic number: 41 Atomic weight: 92.906 Soft, ductile grey-blue metallic transition element. Used in special steels and in welded joints to increase strength. Combines with halogens and oxidizes in air at 200 degrees celsius. Discovered by Charles Hatchett in 1801 and isolated by Blomstrand in 1864. Called {columbium} originally.
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