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VOLUME 35 (1982) | ISSUE 3 | PAGE 111
Phase transitions in sodium-bismuth titanate
The high-temperature phase transitions in Na0 5Bi0 5ТЮ3 have been studied by neutron scattering. The transition at 813 К results from the condensation of a soft mode at the Μ point, while the diffuse transition at 600 К results from the condensation of the R 25 mode and, simultaneously, from the disappearance of the superstructure which arose previously.