Probing the ionic structure of FLiNaK-ZrF₄ salt mixtures by solid-state NMR.

ABSTRACT: In this study, by applying ¹⁹F, ²³Na and ⁷Li high-resolution NMR methods, the evolution of the [Zr _x F _y ]^4x-y local ionic structures in FLiNaK-ZrF₄ salt mixtures were elucidated. K₃ZrF₇, Na₃ZrF₇ and Na₇Zr₆F₃₁ crystal phases were identified when the melt salts were being solidified. The distribution of these [Zr _x F _y ]^4x-y species was dependent on the content of ZrF₄ in FLiNaK eutectic salts. Moreover, K₃ZrF₇ phase transition from an orthorhombic lattice into a disordered cubic lattice was clarified, thereby causing d

SUBMITTER: Lan R 

PROVIDER: S-EPMC9036575 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature