Structure of russellite: Origin of ferroelectricity and the effect of stereoactive lone electron pair on the structure

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Marco E. Ciriotti
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Structure of russellite: Origin of ferroelectricity and the effect of stereoactive lone electron pair on the structure

Messaggio da Marco E. Ciriotti » mar 24 apr, 2018 9:15

Prossima pubblicazione.

Referenza:
▪ Okudera, H., Sakai, Y., Yamagata, K., Takeda, H. (2018): Structure of russellite (Bi2WO6): Origin of ferroelectricity and the effect of stereoactive lone electron pair on the structure. Acta Crystallographica, B74, (in press).

Abstract:
The structure of low temperature-polar (orthorhombic) phase of russellite (Bi2WO6) was re-examined with a single-crystal X-ray diffraction. The position of stereochemically active lone pair of bis­muth was found on the line running through the Bi sites along the b-axis direction. The cause of the ferroelectricity of the compound was ascribed to the strong demand of bis­muth to form shorter Bi—O bonds, and this resulted in the cooperative shift of tungsten leaving its ligands left behind.
Marco E. Ciriotti

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