A variable-temperature synchrotron X-ray diffraction study of the phase transitions in the ferroelectric n = 3 Aurivillius oxide Bi 4 Ti 3 O 12 is described. At room temperature the structure of Bi 4 Ti 3 O 12 is orthorhombic in space group B 2 eb and this continuously transforms to the high-temperature tetragonal I 4/ mmm structure via an intermediate orthorhombic phase. The possible space groups of this intermediate orthorhombic phase have been identified by using group theory.
No takes yet. Share an insight, caveat, or question.
Zhou et al. (2003) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: