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Figure 5
The R5− mode present in the R3c phase of PZT, representing a tilting mode of the oxygen octahedra. It is fully defined by the irrep, having no freedom except its amplitude. For clarity, not all the interconnected oxygen octahedra are shown. This rigid unit mode of the O atoms multiplies the primitive unit cell by a factor of two.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 47| Part 4| August 2014| Pages 1165-1179
https://doi.org/10.1107/S1600576714010693
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