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Monoclinic superstructure in orthorhombic Ce 10 W 22 O 81 from transmission electron microscopy
Author(s) -
Patout Loïc,
Jacob Damien,
Arab Madjid,
Pereira de Souza Carlson,
Leroux Christine
Publication year - 2014
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s2052520613034252
Subject(s) - monoclinic crystal system , superstructure , orthorhombic crystal system , crystallography , transmission electron microscopy , electron diffraction , high resolution transmission electron microscopy , materials science , tungstate , crystal structure , diffraction , chemistry , physics , nanotechnology , optics , metallurgy , thermodynamics
A complex rare‐earth tungstate structure, present in a two‐phased powder, was solved by electron diffraction, precession and high‐resolution electron microscopy. The orthorhombic space group Pbnm and the atomic positions deduced from X‐ray diffraction experiments were confirmed for Ce 10 W 22 O 81 . A C 2/ c monoclinic superstructure, with cell parameters a = 7.8, b = 36.1, c = 22.2 Å and β = 100.2°, was shown and attributed to a partial oxidation of Ce 3+ leading to interstitial oxygen ions.