Definition of Umbite. Meaning of Umbite. Synonyms of Umbite
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Definition of Umbite
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Columbite Columbite 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.
Yttro-columbite Yttro-columbite Yt`tro-co*lum"bite, Yttro-tantalite
Yt`tro-tan"ta*lite, n. (Min.)
A tantalate of uranium, yttrium, and calcium, of a brown or
black color.
