Superstructure reflexions in tilted perovskites Part 1
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912205584203776 |
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| author | Beanland, Richard Sjokvist, Robin |
| author_facet | Beanland, Richard Sjokvist, Robin |
| contents | The superstructure spots that appear in diffraction patterns of tilted perovskites are well documented and easily calculated using crystallographic software. Here, by considering a distortion mode as a perturbation of the prototype perovskite structure, we show how the structure factor equation yields Boolean conditions for the presence of first order superstructure reflexions. A subsequent article describes conditions for second order reflexions, which appear only in structures with mixed in-phase and anti-phase oxygen octahedral tilting. This approach may have some advantages for the analysis of electron diffraction patterns of perovskites. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_16017 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superstructure reflexions in tilted perovskites Part 1 Beanland, Richard Sjokvist, Robin Materials Science The superstructure spots that appear in diffraction patterns of tilted perovskites are well documented and easily calculated using crystallographic software. Here, by considering a distortion mode as a perturbation of the prototype perovskite structure, we show how the structure factor equation yields Boolean conditions for the presence of first order superstructure reflexions. A subsequent article describes conditions for second order reflexions, which appear only in structures with mixed in-phase and anti-phase oxygen octahedral tilting. This approach may have some advantages for the analysis of electron diffraction patterns of perovskites. |
| title | Superstructure reflexions in tilted perovskites Part 1 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2501.16017 |