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Figure 4
600 × 600 px HRTEM image and its Fourier transform (inset in left image) presented in log scale. The inverse Fourier transform for the co-linear peaks of the reciprocal space, encircled with a red continuous line in the inset (right) magnified Fourier transform, was calculated in order to show the Ammann lines. (Right) Image shows wavy lines indicating the phonon strain. A few instances of dark patches are marked with red dotted circles. The line pattern is continuous on both sides of the black area hence there is no jag that can be ascribed to linear phason strain.

IUCrJ
Volume 8| Part 1| January 2021| Pages 87-101
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520015444