The phase-stable spherulite stored for several days including shipping (from China to Sweden) was analysed. To perform a low dose high-throughput phase analysis, we used a method that combined the commercial software EPU-D (Thermo Fisher Scientific) installed on a cryo-TEM for data collection in batch mode with the program edtools for semi-automated data processing and clustering . An atlas of the grid was collected, and suitable crystals were selected manually for data collection. The eucentric height was corrected for each crystal, to maximize the rotation range, which was stored along with the grid locations in the batch list. Tilt-series (-40° to +40°) were then automatically collected from the pre-selected locations in the batch list. For data processing, we utilised the workflow implemented in edtools (Figure ), which adopts a hierarchical clustering analysis (HCA) algorithm to group datasets belonging to the same phase based on the Euclidean distance of the unit cell parameters (Eq. S1), as well as the correlation coefficients (CC) between intensities of common reflections in different datasets.