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Optical and x-ray diffraction investigations of the symmetry of distorted phases of the (NH4)2KGaF6 crystal

  • Lattice Dynamics and Phase Transitions
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Abstract

Powders and single-crystal plates of different sections of an (NH4)2KGaF6 crystal are investigated using polarized light microscopy and x-ray diffraction over a wide temperature range, including the phase transition temperatures. It is established that the sequence of symmetry changes in the crystal under investigation is as follows: O 5 h −Fm3m (Z = 4) ↔ C 54h −I114/m (Z = 2) ↔ C 52h −P1121/n (Z = 2).

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Authors and Affiliations

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

    S. V. Mel’nikova, A. F. Bovina & M. L. Afanas’ev

  2. Krasnoyarsk State Agricultural University, pr. Mira 88, Krasnoyarsk, 660049, Russia

    S. V. Misyul’

Authors
  1. S. V. Mel’nikova
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  2. S. V. Misyul’
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  3. A. F. Bovina
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  4. M. L. Afanas’ev
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__________

Translated from Fizika Tverdogo Tela, Vol. 44, No. 10, 2002, pp. 1876–1880.

Original Russian Text Copyright © 2002 by Mel’nikova, Misyul’, Bovina, Afanas’ev.

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Mel’nikova, S.V., Misyul’, S.V., Bovina, A.F. et al. Optical and x-ray diffraction investigations of the symmetry of distorted phases of the (NH4)2KGaF6 crystal. Phys. Solid State 44, 1967–1971 (2002). https://doi.org/10.1134/1.1514789

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  • DOI: https://doi.org/10.1134/1.1514789

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