Acta Cryst. (2007). E63, i111-i112  [ doi:10.1107/S160053680701210X ]

On the thermal evolution of the crystal structure of SrTeO₃: the -form at 473 K

V. E. Zavodnik, S. A. Ivanov and A. I. Stash

Abstract: As part of a programme to study structural phase transitions in strontium tellurite, SrTeO₃, (STO), the structure of the -form has been determined at 473 K using single-crystal analysis. Both the structural and non-linear optical measurements indicate an - first-order phase-transition temperature that is close to 363 K on heating and 308 K on cooling. The structure of the -phase is monoclinic (C2/c) and does not differ essentially from the -phase (C2) configuration. During the - phase transition there is a slight rearrangement of the cation building blocks [n-vertex SrO_n polyhedra (n = 6, 7 or 8) and TeO₃ pyramids]; this phase transformation can be described by a displacive mechanism.

Online 21 March 2007

Copyright © International Union of Crystallography
IUCr Webmaster