Pressure-induced transitions in ACrF3 (A = Na, K, NH4) fluoroperovskites

The aim of the proposed experiment is to utilize the large-volume press at ESRF to elucidate the pressure-induced structural phase transitions we recently observed in NaCrF3 by x-ray diffraction, and further expand this research to the KCrF3 and NH4CrF3 fluoroperovskites. Through the experiments, we foresee that new insight into Cr(II) fluoroperovskites and the rich structural chemistry of fluorides and fluoroperovskites will be gained, including the discovery of new polymorphs. We hope to encounter interesting magnetic and/or electronic properties in the high-pressure polymorphs. The experiment is a part of an initiative to investigate Cr(II) fluoroperovskites. Neither KCrF3 nor NH4CrF3 are investigated under high-pressure before.