===================================================== DESCRIPTION OF THE FILES DISTRIBUTED WITH THIS ENTRY ===================================================== Figures_main: Contains directories with a brief README and the data to reproduce the figures in the main text, or directions to the relevant directory. For the MD figure, a video is also included. Figures_SI: Contains directories with a brief README and the data to reproduce the figures in the supplemental, or directions to the relevant directory prototypes: Contains the prototypes of barium titanate as well as a cif for a representation of each of the 27 unique cubic ordered templates of spacegroup 221 with occupied Wyckoff positions: 1a, 1b, 3c. In this representation BaTiO3 is used where Ba occupies the 1a, Ti the 1b, and O the 3c Wyckoff position in the high-symmetry phase. materials_displacements: This directory contains the output of the pw.x relax calculations of the 4+4 and 2+6 displacement patterns with fixed lattice parameters. materials_5atom_phonons: This directory contains the phonon calculations for the 5 atom cubic structures pseudopotentials: contains the pseudopotentials used in the calculations