For complex mixtures of polycrystal line materials, this approach is not suited because of the overlap between the Bragg peaks from the different crystal phases and the possible presence of relatively large crystal grains. For this reason, pattern decomposition of the radial scatter profiles is employed as in traditional X-ray powder diffraction, where all Bragg reflections of a specific phase are used instead of just the one diffraction peak; this process is illustrated in Fig. 2.