Movie S1.

Crack healing in the LDA state of a 0.9 M NaK tartrate solution in a polycarbonate capillary (o.d. = 300 μm, i.d.= 200 μm) during the phase transition of the LDA state to cubic ice. (A) Cracks induced in the sample. The sample is rotated by 360° at 90 K to show cracks induced inside. The frame rate used for recording is 7.5 frames per second (fps) and video playback speed is 15 fps. (B) Crack healing inside the LDA sample during warming (from 80 to 170 K). Note that crack healing occurs noticeably above 155 K. The image frames are recorded at 5-K increments, and video playback speed is 2 fps.