Structural phase transitions in elpasolite- and cryolite-type fluorides

1 October 1988

journal article
research article
Published by Taylor & Francis in Phase Transitions

Vol. 13 (1) , 157-163
https://doi.org/10.1080/01411598808206823

Abstract

The occurrence of phase transitions in elpasolite- and cryolite-type fluorides depends mainly on two factors: the electronic structure of the involved transition element and/or the value of the tolerance factor (t) close to the lower limit of the stability range. The phase transitions have been followed using low- and hightemperature X-ray diffraction. EPR signals of Ni¹¹¹ and Pd¹¹¹ compounds are characteristic of a doublet ground state. The trivalent species are located in axially elongated octahedra and a static ← dynamic Jahn-Teller transition can be observed in some of these phases.

Keywords

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