Abstract
Conductivities have been measured by the vector impedance method for the layered compounds anhydrous α-zirconium phosphate, Zr(HPO 4) 2, and several of its sodium ion phases. The values of the ionic diffusion coefficients are of the order of 10 −6-10 −8 cm 2/s at 200°C and activation energies range from 15.6 cal/mol for Zr(HPO 4) 2 to 18.6 cal/mol for ZrHNa(PO 4) 2. Comparisons are made with literature values of conductivity and self-diffusion coefficients for Zr(NaPO 4) 2·3H 2O and kinetically determined diffusion coefficients for the phases containing both sodium and hydrogen ions.
Published Version
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