Mosaicity and Δφ. The mosaicity refined by XDS depends on Δφ. Each line represents a series of data sets collected from the same crystal at increasing Δφ. In the left panel, the mosaicity as refined by XDS and reported in the file CORRECT.LP is plotted on the vertical axis with Δφ on the horizontal axis. In the right panel, the mosaicity of each data set is normalized to the minimal mosaicity of the corresponding series and plotted against Δφ divided by the minimal mosaicity.