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Webster 1913 Edition

Columbium

Co-lum′bi-um

,
Noun.
[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 1828 Edition

Columbium

COLUMBIUM

,
Noun.
A metal first discovered in an ore or oxyd, found in Connecticut, at New-London, near the house of Gov. Winthrop, and by him transmitted to Sir Hans Sloane, by whom it was deposited in the British museum. The same metal was afterwards discovered in Sweden, and called tantalum, and its ore tantalite.

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