Crystal structures of ZrO2


Figure 35: The crystal structures of the cubic, tetragonal, and monoclinic modifications of ZrO2. The different zirconium-oxygen polyhedra are outlined. The cubic fluorite type (space group, Fm-3m) high-temperature g-modification transforms on cooling by a displasive phase transition to tetragonal b-ZrO2 (P42/nmc), which on further cooling transforms, again by a displacive phase transition, to monoclinic a-ZrO2 (P21/c).


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