Triclinic and monoclinic structures of SrLaCuNbO6and SrLaCuTaO6double perovskites

Autor:	Peter K. Davies, D. Vincent West
Rok vydání:	2011
Předmět:	Crystallography Materials science Electron diffraction Jahn–Teller effect Neutron diffraction X-ray crystallography Crystal structure Triclinic crystal system General Biochemistry Genetics and Molecular Biology Powder diffraction Monoclinic crystal system
Zdroj:	Journal of Applied Crystallography. 44:595-602
ISSN:	0021-8898
Popis:	SrLaCuNbO6and SrLaCuTaO6are Jahn–Teller distorted double perovskites with completeB-site ordering. The crystal structure of SrLaCuTaO6has been solved by refinement of neutron powder diffraction data at 323 (triclinic), 573 (monoclinic) and 923 K (body-centered monoclinic). Synchrotron X-ray and electron diffraction reveal local-scale features similar to those seen in ferroelectric perovskites, and also inA-site ordered perovskites exhibiting nanoscale periodicities. The crystal structure of SrLaCuNbO6was solved by refinement of synchrotron X-ray powder diffraction data at 673 and 1273 K. Because of the high resolution of the synchrotron, adjustments to these structure models were necessary in order to account for profile irregularities resulting from the local-scale behavior.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::99d5fbf26f46326d0ed5292892e4139e https://doi.org/10.1107/s0021889811012131 Zobrazit plný text záznamu Plný text