Solids with Two Mobile Ions: Proton H<sup>+</sup> Self-Diffusion in Li–H Exchanged Garnet-Type Li<sub>6</sub>La<sub>3</sub>ZrTaO<sub>7</sub> as Seen by Solid-State <sup>1</sup>H NMR Relaxation
Journal of physical chemistry. C./Journal of physical chemistry. C