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Titre: Contribution of Electron Precession to the Identification of the Space Group from Microdiffraction Patterns.
Auteur(s): J. P. Morniroli, A. Redjaïmia et S. Nicolopoulos
Journal: Ultramicroscopy
Année: 2007
Volume: 107
Issue: 6-7
Pages: 514-522
Organisation: Free Univ Brussels
DOI: 10.1016/j.ultramic.2006.03.013
ISSN: 0304-3991
Résumé: In a previous study, it was reported that the possible space groups of a crystal can be identified at a microscopic or nanoscopic scale, thanks to microdiffraction patterns obtained with a nearly parallel electron incident beam focused on a very small area of the specimen. A systematic method was proposed, which consists of the observation of a few microdiffraction patterns displaying at least two Laue zones. These microdiffraction patterns can also be obtained by using an electron precession equipment. In this case, the patterns display a very large number of reflections in the Laue zones whose intensity is the integrated intensity. These original features greatly facilitate the space group identification method and are particularly useful when the high-order Laue zones (HOLZ) are not visible on microdiffraction patterns or when very thin specimens are not available. (c) 2006 Elsevier B.V. All rights reserved.
Projet: Département SI2M : Microstructures et Contraintes

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