NMR study and electrical properties of (Cs)0.26(Rb)0.74H(SO4)0.89 (SeO4)0.11 mixed crystals

Crystals of (Cs)0.26(Rb)0.74H(SO4)0.89 (SeO4)0.11 (CsRbHSSe) formulation are studied by 1H NMR spectroscopy. The 1H line-shape and the line width are determined as a function of temperature. The activation energy deduced from the temperature dependence of line width is compared with the activation energy issued from conductivity measurements by impedance spectroscopy. The results obtained are discussed and supported by the help of the Ngai model.