Skip to main content
SpringerLink
Log in

Heat capacity, structure, and p-T phase diagram of elpasolite (NH4)2KMoO3F3

  • Lattice Dynamics and Phase Transitions
  • Published:
Physics of the Solid State Aims and scope Submit manuscript

Abstract

Thermophysical and structural studies of an (NH4)2KMoO3F3 crystal show that this crystal belongs to the family of elpasolites (space group \(Fm\bar 3m\)) and undergoes an order-disorder phase transition at T 0 = 241.5 K. Under hydrostatic pressure, this phase transition splits into two consecutive transitions at the tricritical point with parameters T tr = 232.5 K and p tr=0.21 GPa. It was found that anomalous hysteresis and relaxation phenomena accompany the transitions from the cubic to both distorted phases. The results are analyzed taking into account the data on the phase transition in the related elpasolite (NH4)2KWO3F3.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. Ravez, G. Peraudeau, H. Arend, S. C. Abrahams, and P. Hagenmüller, Ferroelectrics 26, 767 (1980).

    Google Scholar 

  2. I. N. Flerov, M. V. Gorev, V. D. Fokina, A. F. Bovina, and N. M. Laptash, Fiz. Tverd. Tela (St. Petersburg) 46(5), 888 (2004) [Phys. Solid State 46 (5), 915 (2004)].

    Google Scholar 

  3. I. N. Flerov, M. V. Gorev, V. D. Fokina, A. F. Bovina, M. S. Molokeev, Yu. V. Boĭko, V. N. Voronov, and A. G. Kocharova, Fiz. Tverd. Tela (St. Petersburg) 48(1), 99 (2006) [Phys. Solid State 48 (1), 106 (2006)].

    Google Scholar 

  4. A. Tressaud, S. Khairoun, L. Rabardel, T. Kobayashi, T. Matsuo, and H. Suga, Phys. Status Solidi A 96, 407 (1986).

    Google Scholar 

  5. I. N. Flerov, M. V. Gorev, K. S. Aleksandrov, A. Tressaud, and V. D. Fokina, Kristallografiya 49(1), 107 (2004) [Crystallogr. Rep. 49 (1), 100 (2004)].

    Google Scholar 

  6. G. Peraudeau, J. Ravez, P. Hagenmüller, and H. Arend, Solid State Commun. 27, 591 (1978).

    Article  Google Scholar 

  7. P.-E. Werner, L. Eriksson, and M. Westdahl, J. Appl. Crystallogr. 18, 367 (1985).

    Article  Google Scholar 

  8. T. Roisnel and J. Rodrigues-Carvajal, in Proceedings of the European Powder Diffraction Conference “EPDIC7,” Barcelona, Spain, 2000 (Mater. Sci. Forum, 2000), Vols. 378–381, Parts 1–2, p. 118.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia

    I. N. Flerov, M. V. Gorev, V. D. Fokina, A. F. Bovina, M. S. Molokeev & E. I. Pogorel’tsev

  2. Institute of Chemistry, Far Eastern Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia

    N. M. Laptash

Authors
  1. I. N. Flerov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. V. Gorev
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. V. D. Fokina
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. F. Bovina
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. M. S. Molokeev
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. E. I. Pogorel’tsev
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. N. M. Laptash
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Original Russian Text © I.N. Flerov, M.V. Gorev, V.D. Fokina, A.F. Bovina, M.S. Molokeev, E.I. Pogorel’tsev, N.M. Laptash, 2007, published in Fizika Tverdogo Tela, 2007, Vol. 49, No. 1, pp. 136–142.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Flerov, I.N., Gorev, M.V., Fokina, V.D. et al. Heat capacity, structure, and p-T phase diagram of elpasolite (NH4)2KMoO3F3 . Phys. Solid State 49, 141–147 (2007). https://doi.org/10.1134/S1063783407010234

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1063783407010234

PACS numbers

Search

Navigation