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Abstract
The aim of this work is to study the structural evolution and stability of ACoF3 (A: K, Rb) undistorted perovskites under high-pressure conditions within the hydrostatic regime (below 10 GPa). Attention is paid to their distortion propensity, extending the pressure range for this purpose. The role of A cations on the crystal compressibility, which can shed light on the mechanism governing the high-pressure evolution of oxides, has been explored. The results are compared with previous reports on the ABF3 family and point out the relevance of d-electron bonding in the crystal compressibility.
Acknowledgements
This research was partially supported by MICINN under project CSD2007-00045 (Consolider-Ingenio 2010). M. Kunz and J.N. Walsh are thanked for experimental support at the ALS. The ALS is supported by the Director, Office of Science, Office of Basic Energy Sciences of the US Department of Energy, under Contract No. DE-AC02-05CH11231.