view article
Figure 8
(a) and (b) Temperature evolution of selected symmetry modes as obtained by temperature-dependent batch Rietveld refinement (all these modes are fixed to 0 above the ferroelastic transition). Modes in (a) show a trend similar to the spontaneous strain, while the modes in (b) increase rapidly below the ferroelastic transition before plateauing. (c) Simplified schematic of the NbO6 (O in red and Nb in green) tilting patterns along the c direction as a result of the mode amplitudes, illustrating that the degree of tilting goes through a maximum at 275 K coinciding with the maximum in the spontaneous strain. The degree of tilting is exaggerated for visual effect.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 5| October 2023| Pages 1456-1465
https://doi.org/10.1107/S1600576723006969
Follow J. Appl. Cryst.
Sign up for e-alerts
E-alerts
Follow J. Appl. Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS