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Convergent beam electron diffraction study of Pb2CoWO6 at 100 K

Buffat, P. A.
Published in Phase Transitions. 1991, vol. 31, no. 1-4, p. 45-54
Abstract A study by convergent beam electron diffraction was performed to clarify the symmetry of the phase III of Pb2CoWO6. Microdiffractions with higher-order Laue zone on monodomain areas have confirmed the cell proposed in a preceding study. In addn., an axial glide plane (c) is normal to the b-axis. In the conditions of observation, the convergent beam electron diffraction patterns lead to an apparent point group mmm. No breakdown of a mirror symmetry could be found. The discrepancy between this result and the existence of a spontaneous polarization is discussed.
Keywords Crystal structureFerroelectricityStructure lead cobalt tungstate ferroelectric
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Project FNS: 1990
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SCIAU, Philippe Guy Paul, BUFFAT, P. A., SCHMID, Hans. Convergent beam electron diffraction study of Pb2CoWO6 at 100 K. In: Phase Transitions, 1991, vol. 31, n° 1-4, p. 45-54. https://archive-ouverte.unige.ch/unige:31428

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Deposited on : 2013-11-27

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