Definitions for: Columbite

[n] a black mineral that is an ore of niobium and tantalum

Webster (1913) Definition: 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.

Synonyms: niobite

See Also: atomic number 41, atomic number 73, mineral, Nb, niobium, Ta, tantalum