Citation: McCall, Kyle M.; Friedrich, Daniel; Chica, Daniel G.; Cai, Weizhao; Stoumpos, Constantinos C.; Alexander, Grant C. B.; Deemyad, Shanti; Wessels, Bruce W.; Kanatzidis, Mercouri G. (2019). Perovskites with a Twist: Strong In1+ Off-Centering in the Mixed-Valent CsInX3 (X = Cl, Br). Chemistry of Materials, , pp. -.