CsCaF3 - //xH//xSOLID SOLUTION (0 less than equivalent to x less than equivalent to 1. 70): STRUCTURAL CHARACTERISTICS AND HYDROGEN DIFFUSION INVESTIGATION.

Article abstract of DOI:10.1016/0025-5408(88)90202-4

A study of the substitution of hydrogen for fluorine in CsCaF//3 shows the existence of a solid solution CsCaF//3// minus //x//H//x (0 less than equivalent to x less than equivalent to 1. 70) with cubic perovskite type structure. Both X-ray powder diffraction and wideline NMR show a statistical distribution of hydrogen and fluorine anions. The thermal evolution of the line width in the NMR spectra for **1H and **1**9F has been studied. The hydride ion is the only mobile one. Ionic-conductivity measurements seem to confirm a diffusion mechanism based on anionic hydrogen vacancies.