Physical Sciences and Mathematics Commons^™

Descent In Symmetry During Solid State Transitions And Other Anomalies In Mixed Valence Compounds Axmxⅱm1-Xⅲf3 (A = K, Rb, Cs; M = V, Cr; X = 0.0 - 1.0), William O. J. Boo, Daniel L. Mattern, Robert M. Metzger

Faculty and Student Publications

The scope of solid-state transitions, from melting temperatures down to 4.2 K, is described for six systems: K_xVF₃, Rb_xVF₃, Cs_xVF₃, K_xCrF₃, Rb_xCrF₃, and Cs_xCrF₃ (for x = 0.0 to 1.0). Connections are drawn between the compounds’ compositions and structures with the various transitions and ordering events. Upon solidification from the melt and gradual cooling to room temperature, a sequential descent of symmetry appears to occur, from high-symmetry perovskite phases, through possible reconstructive transitions, to phases designated α …