Zirconium oxide - sometimes known as zirconia (not to be confused with zircon), is a white crystalline oxide of zirconium. Its most naturally occurring form, with a monoclinic crystalline structure, is the mineral baddeleyite.
Z 2815 (OTTO) Zirconium(IV) oxide, 99.997% Cas 1314-23-4 - used as an additive in the production of piezoelectric crystals, in high-frequency induction coils and in ceramic glazes.