Conclusions
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1.
The nonuniform distribution of vacant and cation-occupied type II positions in the large cavities of dehydrated CaX zeolite gives rise to an electrical moment.
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2.
The alteration of dielectric properties of the CaX zeolite in the neighborhood of 481°K is such as to suggest an order-disorder phase transition resulting from a mutual ordering of the electrical moments in the large cavities.
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3.
The temperature of the transition point (λ-point) shifts under the adsorption of 1–3 molecules of benzene per cavity.
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4.
The mobility of the cation, and of the adsorbed benzene molecule as well, increases rapidly as the temperature is carried above the λ-point.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2439–2443, November, 1977.
The authors would llke to thank B. A. Lipkind who supplied the CaX zeolite used in this work.
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Rakityanskaya, M.F., Fedorov, V.M., Dubinin, M.M. et al. Electrical relaxation in the region of order-disorder phase transitions in CaX zeolites containing up to three molecules of adsorbed benzene per cavity. Russ Chem Bull 26, 2261–2264 (1977). https://doi.org/10.1007/BF00958706
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DOI: https://doi.org/10.1007/BF00958706