GIWAXS 1D integrated patterns of scattering intensity for different q-ranges showing Bragg peaks for hexagonal polytype phases, the 100c perovskite Bragg peaks, respectively for a series of samples with the composition Cs0.05FA0.78MA0.17Pb(I1-xBrx)3 where 0 ≤ x ≤ 0.17. Note that the intensity scale is changed between some panels to visualize peaks. c subscripts indicate that the Miller indices are relative to the pseudocubic unit cells, respectively.
