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Figure 5
Normalized peak intensities of selected Bragg peaks as a function of beam energy around the Br K edge for MAPbBrxI1−x compositions. Calculated data (Stoumpos et al., 2013View full citation; López et al., 2019View full citation; Evans et al., 2018View full citation; Merrit, 2023View full citation) are displayed for a randomly mixed model and a superposition of mixed phases, together with experimental data for compositions of x = 0.2, 0.4, 0.6 and 0.8. (a) Intensity of the 110 diffraction peak and (b) intensity of the 111 diffraction peak. Calculated intensities for further diffraction peaks for the mixed model are shown in Fig. S3 in the supporting information, while reciprocal-space maps for corresponding compositions can be found in Fig. S4.

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