Crystal structure of La3Nb0.5Ga5.5O14 at 20 K
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The atomic structure of La3Nb0.5Ga5.5O14 single crystals (space group P321, R = 2.21%, R w = 2.31%) at 20 K was determined using X-ray diffraction. A comparative analysis of the structural characteristics determined at temperatures of 293 and 20 K did not reveal a noticeable redistribution of bond valences that could be considered precursors of a possible phase transition accompanied by the reduction of the symmetry of the crystal. The assumption was made that the anomalous behavior of the permittivity e 33 of the La3Nb0.5Ga5.5O14 single crystals is associated with the decrease in the possible relative displacements of the Ga(1) and Nb atoms occupying the cation position with point symmetry 32 in a 1: 1 ratio.
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- Crystal structure of La3Nb0.5Ga5.5O14 at 20 K
Volume 51, Issue 1 , pp 23-28
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- 1. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskiĭ pr. 59, Moscow, 119333, Russia
- 2. Department of Physical Sciences, University of Helsinki, Helsinki, Finland