As shown in Figure , all major peaks in the PXRD data collected from the spherulite could be fitted by only including 3 out of the 6 phases identified by high-throughput 3D ED, namely GSF Form III (45/113 crystals), GSF Form I (31/113 crystals), and GSF-PEG IC-I (15/113 crystals). The 2 minor phases, GSF-PEG IC-II (12/113 crystals) and GSF-V (7/113 crystals), found by 3D ED were 'invisible' in PXRD data. Furthermore, the identification of the very minor phase GSF-V (1/113 crystals) illustrates the great sensitivity of high-throughput 3D ED in phase analysis studies.