(mineralogy) An oxide of (primarily) titanium and yttrium, with small to moderate amounts of thorium, uranium, cerium, and calcium substituting for some of the yttrium and traces of iron, tungsten, columbium, and tantalum substituting for some of the titanium.
Related Words
Related dictionary entries include yttrocerite, steenstrupine, pyrrhotine, yttrofluorite, mimetene, yttropyrochlore.