Ionic motion and conduction in (1−x)PbF2xZrF4 and (1−x)PbF2xMF (M = alkali-metal cation) solid solutions were studied by means of 19F and 207Pb nuclear magnetic resonance and impedance spectroscopy. The factors which governed ionic motion in the solid solutions and their structure and energetics at 170 to 550K were analyzed. The ionic conductivity of (1−x)PbF2xZrF4, with x ≤ 0.4, and of 0.93PbF2-0.07MF, was shown to be 10−4 to 10−2S/cm at above 425K. This put these materials into the superionic league.

Synthesis, Ion Mobility, and Superionic Conductivity of (1−x)PbF2▪xMFn (M = Li, Na, K, Rb, Cs, Zr) Solid Solutions. V.Y.Kavun, A.B.Slobodyuk, E.A.Tararako, E.Y.Mikhteeva, V.K.Goncharuk, N.F.Uvarov, V.I.Sergienko: Inorganic Materials, 2005, 41[11], 1228-35