Probing the ionic structure of FLiNaK-ZrF4 salt mixtures by solid-state NMR.
RSC Adv
; 11(39): 23846-23850, 2021 Jul 06.
Article
em En
| MEDLINE
| ID: mdl-35479022
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 dynamics of the coordinated F- ions to be reduced and the well-ordered crystal lattices to be destroyed. These mentioned results provide a further insight into the Zr-F based ionic structure and the formation of the disordered Zr-F structure in ZrF4-based eutectic salts.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
RSC Adv
Ano de publicação:
2021
Tipo de documento:
Article