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A New Bi 4 Mn 1/3 W 2/3 O 8 Cl Sillén–Aurivillius Intergrowth: Synthesis and Structural Characterisation by Quantitative Transmission Electron Microscopy
Author(s) -
ÁvilaBrande David,
OteroDíaz L. Carlos,
LandaCánovas Ángel R.,
Bals Sara,
Van Tendeloo Gustaaf
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200501021
Subject(s) - aurivillius , chemistry , orthorhombic crystal system , sill , crystallography , transmission electron microscopy , diffraction , electron diffraction , crystal structure , x ray crystallography , lattice (music) , powder diffraction , nanotechnology , optics , materials science , physics , optoelectronics , geochemistry , dielectric , ferroelectricity , geology , acoustics
The synthesis and structural characterisation of a new phase with nominal composition Bi 4 Mn 1/3 W 2/3 O 8 Cl is presented. Conventional and analytical transmission electron microscopy are used to determine the composition, unit‐cell symmetry and space group of the compound, whereas a structural model is deducted by exit‐wave reconstruction in the transmission electron microscope. This technique allows the microscope information limit of 1.1 Å to be reached and the (light) oxygen atoms in the presence of heavier atoms (Bi, W, Mn) to be imaged. The average structure is refined from X‐ray powder diffraction data using the Rietveld method yielding an orthorhombic unit cell with lattice parameters a = 5.467(4) Å, b = 5.466(7) Å and c = 14.159(3) Å and space group Cm 2 m , which could be described as a Sillén–Aurivillius intergrowth. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)