Yttro-columbite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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]