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Article | REF: N3210 V1

Zirconia

Authors: Gérard MOULIN, Jérôme FAVERGEON, Gérard BÉRANGER

Publication date: October 10, 2008

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2. Allotropic transformations

2.1 Crystallography of pure zirconia

Pure zirconia obtained from ore has a monoclinic crystal structure at room temperature. The zirconium is coordinated by seven oxygens (figure 1 ). This relatively irregular arrangement partly explains the monoclinic phase's tendency to form macles to minimize lattice distortion.

Representation of the zirconium ion environment for the cubic, quadratic and monoclinic phases of pure zirconia (from 87)
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Allotropic transformations
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