Acta Crystallographica Section E

Structure Reports Online

Volume 64, Part 8 (August 2008)

inorganic compounds

 

The -phase of SrTeO₃ at 780 K

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

Abstract: As part of a structural investigation of strontium tellurate(IV) (STO), SrTeO₃, with particular emphasis on the crystal chemistry and phase transitions, the structure of the -phase has been determined at 780 K using a single-crystal analysis. Both structural and non-linear optical measurements indicate that STO undergoes a second-order ferroelectric phase transition at 633 K from the C2 () to the C2/m () modification. Systematic differences between the similar - and -phase structures were determined and it was found that this phase transformation can be described by a displacive mechanism.

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