Yttro-cerite

from The Collaborative International Dictionary of English v.0.48

Yttro-cerite \Yt`tro-ce"rite\, n. (Min.)
   A mineral of a violet-blue color, inclining to gray and
   white. It is a hydrous fluoride of cerium, yttrium, and
   calcium.
   [1913 Webster] Yttro-columbite