|
|||||
|
|
Crystal structure of the ‘mixed-layer’ Aurivillius phase Bi5TiNbWO15 |
|
| Authors: | Alan Snedden Valeriy A. Dolgikh |
| Affiliation: | a School of Chemistry, University of St Andrews, St Andrews, Purdie Building, Fife, Scotland, KY16 9ST, UK b Department of Materials Sciences, Moscow State University, 119992 Moscow GSP-2 Russia c Department of Chemistry, Moscow State University, 119992 Moscow GSP-2 Russia |
| Abstract: | The crystal structure of the Aurivillius phase Bi5TiNbWO15 has been analyzed in detail using powder X-ray and neutron diffraction. The structure can be described as a regular intergrowth of alternating single and double perovskite-like layers sandwiched between fluorite-like bismuth oxide layers, such that the layer sequence is … [WO4]-[Bi2O2]-[BiTiNbO7]-[Bi2O2] …. There is complete ordering of tungsten within the B sites of the single perovskite layer, so that the structure can be described as a direct intergrowth of the ‘component’ Aurivillius phases Bi2WO6 and Bi3TiNbO9. At 25 °C the structure adopts the polar orthorhombic space group I2cm,  ,  ,  . |
| Keywords: | Aurivillius phase Ferroelectric Neutron diffraction Bismuth oxide |
| 本文献已被 ScienceDirect 等数据库收录！ | |