Solid State Ionics, Vol.145, No.1-4, 261-264, 2001
Cation mobility in acid zirconium and tantalum phosphates and ion-exchange products (NaXH1-XTa(PO4)(2) center dot nH(2)O and NaYH2-YZr(PO4)(2) center dot nH(2)O)
Ion mobility has been investigated by impedance and Na-23 NMR relaxation measurements in the layered alpha -zirconium and tantalum phosphates and several of their sodium derivatives (NagammaH2-gammaZr(PO4)(2) . nH(2)O and NaxH1-XTa(PO4)(2) . nH(2)O). Sharp ion conductivity increase was detected for the small degrees of substitution in alpha -zirconium phosphate.