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Figure 4
Temperature dependence of the tetragonal (a) 421, 440 and (b) 660 reflections from X-ray powder diffraction. Clear peak splitting is observed for the three reflections with decreasing temperature, with the 660 reflection staying visibly split down to 4 K. The asterisks in panel (a) highlight some of the reflections that are characteristic for Ama2 relative to the other structures investigated. Note that the two middle reflections marked with asterisks are composite reflections.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 5| October 2023| Pages 1456-1465
https://doi.org/10.1107/S1600576723006969
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