Crystal structure of the high-temperature protonic conductor SrCeO3
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 4 (6), 867-868
- https://doi.org/10.1039/jm9940400867
Abstract
The crystal structure of the perovskite-like high-temperature protonic conductor SrCeO3 has been studied with single-crystal and powder X-ray diffraction. SrCeO3 crystallizes in the orthorhombic space group Pbnm, Z= 4, with the unit-cell parameters a= 6.0117(4)Å, b= 6.1538(5)Å and c= 8.5886(9)Å. The structure was refined to a weighted R value of 0.0226 for the single-crystal data. The oxygen coordination around cerium is almost perfectly octahedral, whereas the SrO12 polyhedra are rather distorted. SrCeO3 is isostructural with another high-temperature protonic conductor, BaCeO3, but displays an appreciably higher degree of lattice distortion.Keywords
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