A cerium-doped SrTiO3 compound with the composition Sr0.4Ce0.4TiO3 has been produced by conventional solid-state processing. The structure of this compound was analyzed by X-ray, electron, and neutron diffraction. While no superlattice can be observed via X-ray diffraction, both electron and neutron diffraction show evidence of a noncubic supercell caused by antiphase tilting of oxygen octahedra. The most likely space group is C2/c, corresponding to an a−b−b− tilt system. Octahedra are tilted by 5° about the pseudo-cubic a-axis and 1.5° about the pseudo-cubic b- and c-axes.
Available at: http://works.bepress.com/rick_ubic/2/