Journal of Structural Chemistry

, Volume 46, Issue 5, pp 839–847 | Cite as

Ion mobility, phase transitions, and ion transport in potassium-ammonium hexafluorozirconates

  • V. Ya. Kavun
  • N. A. Didenko
  • A. B. Slobodyuk
  • I. A. Tkachenko
  • A. V. Gerasimenko
  • N. F. Uvarov
  • V. I. Sergienko
Article

Abstract

The mobility of fluoride and ammonium ions (180–480 K) in compounds K2− n(NH4)nZrF6 (0.2 ≤ n ≤ 1.70) was investigated by 19F and 1H NMR. Correlations have been found between the composition of the cation sublattice, the character of ion motions, and phase transition temperature in these compounds. The hightemperature modifications with n ≥ 0.85 of the compounds are characterized by translational diffusion of fluoride and ammonium ions and by uniaxial anisotropy of the 19F magnetic shielding tensor. The electrophysical characteristics of these compounds were studied in the temperature range 300–480 K.

Keywords

potassium-ammonium hexafluorozirconates ion mobility phase transitions ion conductivity 19F and 1H NMR spectra 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    V. Ya. Kavun, V. I. Sergienko, and T. F. Antokhina, Zh. Neorg. Khim., 35, No. 7, 1820–1826 (1990).Google Scholar
  2. 2.
    V. Ya. Kavun, V. I. Sergienko, and T. F. Antokhina, Zh. Strukt. Khim., 36, No. 4, 697–702 (1995).Google Scholar
  3. 3.
    V. Ya. Kavun, V. I. Sergienko, S. P. Gabuda, and R. L. Davidovich, ibid., 41, No. 4, 732–738 (2000).Google Scholar
  4. 4.
    V. Ya. Kavun, V. I. Sergienko, B. N. Chernyshev, et al., Zh. Neorg. Khim., 36, No. 4, 1004–1010 (1991).Google Scholar
  5. 5.
    V. Ya. Kavun, V. I. Sergienko, and N. F. Uvarov, Zh. Strukt. Khim., 44, No. 5, 865–870 (2003).Google Scholar
  6. 6.
    Yu. N. Moskvich, B. I. Cherkasov, and R. L. Davidovich, “Anion motion in rubidium and cesium hexafluorozirconates and hexafluorohafnates,” in: Nuclear Magnetic Resonance in Crystals [in Russian], IF SO AN SSSR, Krasnoyarsk (1978), pp. 112–121.Google Scholar
  7. 7.
    V. Ya. Kavun, N. A. Didenko, I. A. Tkachenko, et al., Vestn. Dalnevost. Otd. Ross. Akad. Nauk, No. 6, 47–62 (2002).Google Scholar
  8. 8.
    I. A. Tkachenko, A. V. Gerasimenko, V. Ya. Kavun, and V. I. Sergienko, Abstracts of Papers from the 3rd National Crystal-Chemical Conference, Chernogolovka (2003), p. 220.Google Scholar
  9. 9.
    I. V. Tananaev and L. S. Guzeeva, Izv. Akad. Nauk SSSR, Ser. Neorg. Mater., 4, No. 2, 207–212 (1968).Google Scholar
  10. 10.
    J. Waugh and E. I. Fedin, Fiz. Tverd. Tela, 4, No.8, 2233–2237 (1962).Google Scholar
  11. 11.
    V. M. Buznik, Nuclear Spectroscopy of Inorganic Fluorides [in Russian], Dalnauka, Vladivostok (1997).Google Scholar
  12. 12.
    A. Abragam, The Principles of Nuclear Magnetism, Clarendon Press, Oxford (1961).Google Scholar
  13. 13.
    S. P. Gabuda, R. L. Davidovich, S. G. Kozlova, and N. K. Moroz, Zh. Strukt. Khim., 37, No. 2, 388–390 (1996).Google Scholar
  14. 14.
    S. P. Gabuda, Yu. V. Gagarinskii, and S. A. Polishchuk, NMR in Inorganic Fluorides [in Russian], Atomizdat, Moscow (1978).Google Scholar
  15. 15.
    E. I. Voit, A. V. Voit, V. Ya. Kavun, and V. I. Sergienko, Zh. Strukt. Khim., 45, No. 4, 644–650 (2004).Google Scholar
  16. 16.
    A. V. Gerasimenko, V. Ya. Kavun, V. I. Sergienko, and T. F. Antokhina, Koordinats. Khim., 25, No. 8, 604–610 (1999).Google Scholar
  17. 17.
    B. V. Bukvetskii, A. V. Gerasimenko, and R. L. Davidovich, ibid., 17, No. 1, 35–43 (1991).Google Scholar
  18. 18.
    V. M. Buznik, Yu. N. Moskvich, V. V. Sokolovich, et al., Zh. Strukt. Khim., 20, No. 4, 622–626 (1979).Google Scholar
  19. 19.
    V. Ya. Kavun, S. P. Gabuda, S. G. Kozlova, and R. L. Davidovich, ibid., 40, No. 4, 664–672 (1999).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • V. Ya. Kavun
    • 1
  • N. A. Didenko
    • 1
  • A. B. Slobodyuk
    • 1
  • I. A. Tkachenko
    • 1
  • A. V. Gerasimenko
    • 1
  • N. F. Uvarov
    • 2
  • V. I. Sergienko
    • 1
  1. 1.Institute of Chemistry, Far East DivisionRussian Academy of SciencesVladivostok
  2. 2.Institute of Solid State Chemistry and Mechanochemistry, Siberian DivisionRussian Academy of SciencesNovosibirsk

Personalised recommendations