Phase transitions in sodium-bismuth titanate
Vakhrushev S . B. , Kvyatkovskii B. E., Okuneva N. M. , Plachenova E. L. , Syrnikov P. P.
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.