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niobium    音标拼音: [n,ɑɪ'obiəm]
n. 铌

铌

niobium
n 1: a soft grey ductile metallic element used in alloys; occurs
in niobite; formerly called columbium [synonym: {niobium},
{Nb}, {atomic number 41}]

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}.
[1913 Webster]


niobium \ni*o"bi*um\, n. [NL., fr. L. & E. {Niobe}.] (Chem.)
The chemical element of atomic number 41. Chemical symbol Nb.
Atomic weight 92.91. Previously called {columbium}. See also
{Columbium}.
[1913 Webster]

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