ROUDEAU, Sabine; PECHEV, Stanislav; WEILL, François; BASSAT, Jean-Marc.; GRENIER, Jean-Claude

doi:10.1016/j.crci.2007.10.002

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ROUDEAU, Sabine
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

PECHEV, Stanislav
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

WEILL, François
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre de Ressources en Microscopie Electronique et Microanalyse

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Comptes Rendus. Chimie. 2008, vol. 11, n° 6-7, p. 734-740

Académie des sciences (Paris)

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The crystal structure of the deficient perovskite Nd1/3NbO3 has been determined at room temperature, using electron microscopy observations and X-ray powder diffraction data. Electron diffraction study and HRTEM images evidence the doubling of a and b parameters and confirm one of the c-parameter with respect to perovskite unit cell. The structure refinement has been carried out using the orthorhombic Cmmm space group. The Nd3+ cations occupy randomly and alternatively the (00l) planes and Nb5+ cations distorted octahedral sites. This structure is characterized by the presence of empty Nd3+ sites in every second layer and the tilting of the octahedral sites around the b-axis. In addition, electron diffraction patterns exhibit weak additional diffuse reflections, which supposes some ordering of the Nd vacancies.< Leer menos

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Electron microscopy and structural studies of Nd1/3NbO3

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