Atomic structure of Sr0.75Ba0.25Nb2O6 single crystal and composition-structure-property relationin (Sr,Ba)Nb2O6 solid solutions |
| |
| Authors: | T S Chernaya B A Maksimov T R Volk L I Ivleva V I Simonov |
| |
| Institution: | (1) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333, Russia;(2) Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 117942, Russia |
| |
| Abstract: | The structure of the Sr0.75Ba0.25Nb2O6 single crystal has been investigated by x-ray diffraction. The occupancies of the Ba and Sr sites in two structural channels are determined. It is found that these sites are split in the large (pentagonal) channel. A qualitative correlation is revealed between the smearing of the phase transition and the displacement of the Sr atom from the m symmetry plane in the pentagonal channel at different Sr]/Ba] ratios. The degree of acentricity of the NbO6 octahedra is analyzed as a function of the Sr]/Ba] ratio. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
