Abstract
Solid solutions of the structure γ-K4P2O7, which have the composition (K1 – x Rb x )3.8M0.1P2O7(M = Ca, Sr, Cd, Ba) and (K1 – x Rb x )4 – 2y Ca y P2O7(y= 0.025–0.20), are synthesized. The solutions' electroconductivity is studied in the temperature range 400–600°C. The concentration dependences of the conductivity and the activation energy for conduction have extremums at x≈ 0.6, which points to the polyalkaline effect. The effect increases with decreasing radius of cation M2+and with increasing concentration of calcium cations, which is explained by an increased energy nonequivalence of positions in the cation sublattice accessible to alkali ions.
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Smirnov, N.B., Burmakin, E.I., Antonov, B.D. et al. Co-cation Conduction in Solid Solutions (K1 – xRbx)4P2O7–M2P2O7(M = Ca, Sr, Cd, Ba): Dependence on the Nature and Concentration of Cations M2+. Russian Journal of Electrochemistry 37, 322–325 (2001). https://doi.org/10.1023/A:1009045918359
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DOI: https://doi.org/10.1023/A:1009045918359