Columbium

(definition) by Webster 1913 Tue Dec 21 1999 at 22:36:11

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.

 

© Webster 1913.

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