Crystallography Reports

, Volume 63, Issue 2, pp 196–199 | Cite as

Study of the Phase Transition in Hg2Cl2 Crystals Using Anomalous X-Ray Transmission

  • M. E. Boiko
  • M. D. Sharkov
  • A. M. Boiko
  • S. G. Konnikov
Lattice Dynamics and Phase Transitions


The small-angle X-ray scattering in calomel (univalent mercury chloride Hg2Cl2) single crystals at low temperatures has been investigated. Data on the size of superstructural ferroelectric domains have been obtained for the first time. Lang measurements with anomalous X-ray transmission have made it possible to trace the temperature dynamics of crystal lattice of the high-temperature D4h phase of Hg2Cl2 from 300 K to the Curie temperature (186 K) and the formation of ferroelastic domains in the temperature range of 186–100 K. The lowering of paraphase symmetry in the closest vicinity of the phase transition temperature is indicative of tricritical point transition.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    E. Dorm, Chem. Commun. 466 (1971).Google Scholar
  2. 2.
    M. E. Boiko, Yu. F. Markov, V. S. Vikhnin, et al., Ferroelectrics 130 (2), 263 (1992).CrossRefGoogle Scholar
  3. 3.
    E. M. Roginskii, Yu. F. Markov, and M. B. Smirnov, Phys. Solid State 57 (3), 467 (2015).ADSCrossRefGoogle Scholar
  4. 4.
    M. E. Boiko and A. A. Vaipolin, Fiz. Tverd. Tela 19 (6), 1903 (1977).Google Scholar
  5. 5.
    G. J. Rosasco, H. S. Parker, R. S. Roth, et al., J. Phys. C 11, 35 (1978).ADSCrossRefGoogle Scholar
  6. 6.
    A. Authier, S. Lagomarsino, and B. K. Tanner, X-Ray and Neutron Dynamical Diffraction: Theory and Applications (Plenum Press, NYC, 1996).CrossRefGoogle Scholar
  7. 7.
    Ch. Barta, A. A. Kaplyanskii, V. V. Kulakov, and Yu. F. Markov, Fiz. Tverd. Tela 17 (4), 1129 (1975).Google Scholar
  8. 8.
    Ch. Barta, A. A. Kaplyanskii, Yu. F. Markov, and V. Yu. Mirovitskii, Fiz. Tverd. Tela 24 (3), 875 (1982).Google Scholar
  9. 9.
    M. E. Boiko, M. D. Sharkov, A. M. Boiko, et al., Tech. Phys. 60 (11), 1575 (2015).CrossRefGoogle Scholar
  10. 10.
    L. D. Landau and E. M. Lifshitz, Electrodynamics of Continuous Media (Fizmatlit, Moscow, 2005; Pergamon, New York, 1984).zbMATHGoogle Scholar
  11. 11.
    O. S. Marenkov and B. G. Komkov, Table of Total Mass Attenuation Coefficients of Characteristic X-Rays: A Guideline, Ed. by N. I. Komyak (LNPO Burevestnik, Leningrad, 1978) [in Russian].Google Scholar

Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  • M. E. Boiko
    • 1
  • M. D. Sharkov
    • 1
  • A. M. Boiko
    • 1
  • S. G. Konnikov
    • 1
  1. 1.Ioffe InstituteRussian Academy of SciencesSt. PetersburgRussia

Personalised recommendations