The q 3 parameter for each PS 4 3unit was calculated for τ and was classified as glassy or crystalline using the threshold described in Sec. "Classification of Crystalline and Glassy PS 4 3 -Units." Fig. displays an example of snapshots of crystal growth for the system with the (100) plane. A visualization of the crystal growth for all models is provided in the Supporting Information (crystallization.mp4). In the snapshots and the movie, S atoms are colored yellow and green for crystalline and glassy PS 4 3units, respectively.