Atomic structure of Sr0.75Ba0.25Nb2O6 single crystal and composition-structure-property relation in (Sr,Ba)Nb2O6 solid solutions

Authors
Chernaya, TS Maksimov, BA Volk, TR Ivleva, LI Simonov, VI
Citation
Ts. Chernaya et al., Atomic structure of Sr0.75Ba0.25Nb2O6 single crystal and composition-structure-property relation in (Sr,Ba)Nb2O6 solid solutions, PHYS SOL ST, 42(9), 2000, pp. 1716-1721
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICS OF THE SOLID STATE
ISSN journal
10637834 → ACNP
Volume
42
Issue
9
Year of publication
2000
Pages
1716 - 1721
Database
ISI
SICI code
1063-7834(2000)42:9<1716:ASOSSC>2.0.ZU;2-Z
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 struct ural 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 fr om the m symmetry plane in the pentagonal channel at different [Sr]/[Ba] ra tios. The degree of acentricity of the NbO6 octahedra is analyzed as a func tion of the [Sr]/[Ba] ratio. (C) 2000 MAIK "Nauka/ Interperiodica".