Abstract
Sr3V2O8 exhibits sizeable oxide ion and proton conductivity at 800 °C. In order to investigate any correlation between the crystal structure and electrical properties of Sr3V2O8, a variable temperature neutron diffraction study has been performed. Results show that there is no change in crystal symmetry upon heating. However, the VO4 tetrahedra are observed to become more distorted upon heating and more oblate in shape. The distortion arises due to a shortening of the apical V–O1 bond length and accompanying increase of the V–O2 bond length with temperature. Bond valence site energy analysis show that there is a reduction in the energy of the migration pathways for movement of the oxide ions as the Sr–V–Sr bottlenecks expand upon heating.
| Original language | English |
|---|---|
| Article number | 124512 |
| Number of pages | 6 |
| Journal | Journal of Solid State Chemistry |
| Volume | 331 |
| Early online date | 23 Dec 2023 |
| DOIs | |
| Publication status | Published - Mar 2024 |
Bibliographical note
This research was supported by the Leverhulme Trust (RF-2020-295\4 and DS-2017-073). DNT, a Leverhulme Trust Doctoral Scholar, is part of the 15 PhD scholarships of the “Leverhulme Centre for Doctoral Training in Sustainable Production of Chemicals and Materials” at the University of Aberdeen (Scotland, United Kingdom). We acknowledge the UK Science and Technology Facilities Council (STFC) for provision of neutron beamtime at the ILL.Data Availability Statement
Data will be made available on request.Supplementary data to this article can be found online at https://doi.org/10.1016/j.jssc.2023.124512.
Keywords
- oxide ion conductor
- proton conductor
- neutron diffraction
- polyhedral distortion