Cation mobility in acid zirconium and tantalum phosphates and ion-exchange products (NaXH1−XTa(PO4)2·nH2O and NaYH2−YZr(PO4)2·nH2O)

Synthesis, characterization and proton transport properties of a mixed material—Zirconium titanium phosphate, a tetravalent bimetallic acid salt

“…It is also reported that the conductivity varies linearly with the number of surface phosphate groups [19]. The mechanism of diffusion and proton transport in crystalline zirconium phosphate (ZP), titanium phosphate (TP), tin phosphate, tantalum phosphate, uranyl phosphate have been studied in detail by various workers [19][20][21][22][23][24][25][26][27][28][29]. From our laboratory, we have reported proton transport properties of M(IV) tungstates and phosphates, where M(IV) = Zr, Sn, Ti [30,31].…”

Ion DiffusionThrow Interface in Heterogeneous Solid Systems with the Modified Surface

“…nH 2 0 or M 2 Zr(PO 4 ) 2 . nH 2 0) -on its surface [25]. It is possible to note the tendency to conductivity increase with sharp maxima at the beginning of each stage (Fig.…”

Ion transfer in ion-exchange and membrane materials

“…85 At the same time the cation mobility in this compound is much higher than that in the hydrogen phosphates of tetravalent elements. 86,87 Another group of layered compounds possessing ionexchange properties comprises hydrated oxyphosphates of pentavalent metals H 2 XO 2 PO 4 . n H 2 O (X = V, Nb, Mo).…”

“…Such effects were detected in studies of the kinetics of ion exchange and ionic conductivity in the NaHZr(PO 4 ) 23 Na NMR spectra. 84,87 IV. Transport equations…”