Mather, GlennFigueiredo, FilipeRomero de Paz, JulioGarcía Martín, Susana2024-01-302024-01-302008Mather, Glenn C., et al. «Strontium Superstoichiometry and Defect Structure of SrCeO 3 Perovskite». Inorganic Chemistry, vol. 47, n.o 3, febrero de 2008, pp. 921-29. https://doi.org/10.1021/ic701703c.0020-166910.1021/ic701703chttps://hdl.handle.net/20.500.14352/96334Strontium cerate (SrCeO3) is the parent phase of a family of prototype proton-conducting perovskites with important potential applications as electrolytes in protonic ceramic fuel cells, hydrogen-separation membranes, and sensors for hydrogen and humidity. Apparent nonstoichiometric behavior and the microstructure of SrCeO3 have been investigated. Phase analysis by X-ray diffraction indicates that single-phase material in the system Sr1+xCeO3+d is obtained for compositions x = 0.02-0.03 and that nominally stoichiometric SrCeO3 (x= 0) synthesized by either solid-state reaction or the citrate method is Sr-rich. Selected area electron diffraction confirms that the system crystallizes with the GdFeO3-type orthorhombic perovskite structure (space group Pnma). Structural defects characterized by high-resolution transmission electron microscopy include twin domain boundaries and SrO-rich, Ruddlesden-Popper-type planar defects. Magnetic susceptibility measurements down to 2 K indicate that the Ce3+ content is minor (0.01 mol per formula unit for slow-cooled material) and does not influence the observed nonstoichiometry.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article1520-510Xhttps://doi.org/10.1021/ic701703crestricted access546Química inorgánica (Química)MaterialesFísica del estado sólido2303.24 Tierras Raras2303.26 Estructura de Los Compuestos Inorgánicos2211.17 Propiedades Magnéticas