zirconolitehttp://www.oed.com/dictionary/zirconolite_n%3Ftab%3Dmeaning_and_usezirconolite, n.
Revised 2021

zirconolitenoun

Mineralogy.
  1. 1957–
    Any of a group of very similar minerals which consist of mixed oxides of calcium, zirconium, and titanium, and occur as small black or brown prisms or more commonly in amorphous form.
    Chemical formula: CaZrTi2O7, usually with thorium, cerium, and other metals. Crystal system: orthorhombic (also monoclinic and trigonal).
     
    Very similar to zirkelite n., and sometimes not distinguished from it.
    1. 1957
      The new mineral zirconolite, a complex oxide of the type AB3O7.
      Chemical Abstracts vol. 51 6440 (heading)
    2. 1980
      Synthetic zirconolite..has been proposed as a constituent phase of an artificial rock (SYNROC) which may immobilise, in solid solution, the elements occurring in high-level nuclear reactor wastes.
      Nature 17 January 282/1
    3. 2006
      The residues' final waste form will be a ceramic composite employing zirconolite, which is appropriate for plutonium immobilization.
      Platts NuclearFuel (Nexis) 22 May 13

zirconolite, n. was revised in March 2021.

zirconolite, n. was last modified in July 2023.