Isosymmetric temperature-triggered structural phase transition of dabcodiium chlorochromate chloride

► Dabcodiium chlorochromate chloride undergoes an isosymmetric temperature-triggered structural phase transition. ► The relationship between the two cells is 3a, b, c (RT) approximates a, b, c (LT). ► The transition mechanism is related to a 60° rotation of one of every three CrO3 groups around the Cr-Cl bond. ► The transition results in thermal and dielectric anomaly.