| slovo | definícia |
columbite
(encz) | columbite,niobit Zdeněk Brož |
Columbite
(gcide) | 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.
[1913 Webster] |
columbite
(wn) | columbite
n 1: a black mineral that is an ore of niobium and tantalum
[syn: niobite, columbite] |
| | podobné slovo | definícia |
columbite
(encz) | columbite,niobit Zdeněk Brož |
columbite-tantalite
(encz) | columbite-tantalite, n: |
Yttro-columbite
(gcide) | 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.
[1913 Webster] |
columbite
(wn) | columbite
n 1: a black mineral that is an ore of niobium and tantalum
[syn: niobite, columbite] |
columbite-tantalite
(wn) | columbite-tantalite
n 1: a valuable black mineral combining niobite and tantalite;
used in cell phones and computer chips [syn: {columbite-
tantalite}, coltan] |
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