Structure of Compounds in the Sr1–3x/2CexTiO3 Homologous Series

Authors

Rick Ubic, Boise State UniversityFollow
Ganesanpotti Subodh, National Institute for Interdisciplinary Science and Technology
Mailadil T. Sebastian, National Institute for Interdisciplinary Science and Technology
Delphine Gout, Los Alamos Neutron Science Center
Thomas Proffen, Los Alamos Neutron Science Center

Document Type

Article

Publication Date

5-13-2008

Abstract

Four compositions in the Sr_1–3x/2Ce_xTiO₃ homologous series, corresponding to x = 0.1333, 0.1667, 0.25, and 0.4, have been produced by conventional solid-state processing. The structure of these compounds 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 R3̅c, corresponding to an a⁻a⁻a⁻ tilt system, except for the composition x = 0.4, for which an even more complex superstructure is observed. The degree of tilt increases with increasing x.

Publication Information

Ubic, Rick; Subodh, Ganesanpotti; Sebastian, Mailadil T.; Gout, Delphine; and Proffen, Thomas. (2008). "Structure of Compounds in the Sr1–3x/2CexTiO3 Homologous Series". Chemistry of Materials, 20(9), 3127-3133. https://doi.org/10.1021/cm703659f