Phase Transitions and Ionic Mobility in Solid Solutions in the System (NH4)2ZrF6–InF3

Abstract

¹H and ¹⁹F NMR, XRD, and DTA methods are used to study thermal properties, ion mobility, and phase transitions (PT) in solid solutions obtained by doping anion-cationic conductor (NH₄)₂ZrF₆ with indium trifluoride. The types of ionic mobility are determined in the fluorine and ammonium sublattices of synthesized solid solutions at 150–450 K, their activation energies are estimated. A phase transition associated with formation of high-temperature modifications is registered at 400–413 K; ionic mobility in these modifications is mostly due to the diffusion of fluorine and ammonium ions.