资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.