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On the Rb+ and K+ counterdiffusion in single crystals of K(TiO)PO4 -a quasi-one-dimensional superionic conductor

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Abstract

The diffusion behaviour of Rb/K in K(TiO)PO4 single crystals has been investigated in the temperature range 350 °C – 450 °C in detail. After a contact of the crystals with Rb containing nitrate melts (8 min - 16 h) the degree of ion exchange and the counterdiffusion coefficient are analyzed in relevant cystallographic directions. A simple atomic model is used to explain the anisotropy of diffusion and the activation energy for the Rb/K counterdiffusion. The influence of different size of the “bottle necks” and different jump distances is discussed for some elementary diffusion steps in the structure of KTP.

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  1. Fachhochschule Jena, Germany

    R. Wellendorf, Chr Kaps & R. Kriegel

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  1. R. Wellendorf
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  2. Chr Kaps
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  3. R. Kriegel
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Wellendorf, R., Kaps, C. & Kriegel, R. On the Rb+ and K+ counterdiffusion in single crystals of K(TiO)PO4 -a quasi-one-dimensional superionic conductor. Ionics 2, 222–230 (1996). https://doi.org/10.1007/BF02376026

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