Metal Vacancy Ordering in an Antiperovskite Resulting in Two Modifications of Fe 2 SeO
| العنوان: | Metal Vacancy Ordering in an Antiperovskite Resulting in Two Modifications of Fe 2 SeO |
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| المؤلفون: | Taylor Wright, Yurii Prots, Martin Valldor, Andrew Fitch |
| المصدر: | Angewandte Chemie International Edition. 55:9380-9383 |
| بيانات النشر: | Wiley, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Materials science, Crystal growth, General Medicine, 02 engineering and technology, General Chemistry, Crystal structure, Atmospheric temperature range, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, Metal, Antiperovskite, Crystallography, Vacancy defect, visual_art, Lattice (order), X-ray crystallography, visual_art.visual_art_medium, 0210 nano-technology |
| الوصف: | Small, red Fe2 SeO single crystals in two modifications were obtained from a CsCl flux. The metastable α-phase is pseudo-tetragonal (Cmce, a=16.4492(8) Å, b=11.1392(4) Å, c=11.1392(4) Å), whereas the β-phase is trigonal (P31 , a=9.8349(4) Å, c=6.9591(4) Å)) and thermodynamically stable within a narrow temperature range. Both crystal structures were solved from twinned specimens. The enantiomers of the β-phase appear as racemic mixtures. Selenium and oxygen form two individual interpenetrating primitive cubic lattices, giving a bcc packing. A quasi-octahedrally coordinated iron atom is found close to the center of each surface of the selenium sublattice. The difference between the α- and β-phases is the distribution of iron at 2/3 of the surfaces. α- and β-Fe2 SeO are comparable with metal-vacancy-ordered antiperovskites. Each Fe/O lattice can also be described in terms of vertex-sharing OFe4 tetrahedra, with a crystal structure similar to that of an antisilicate. Iron is divalent and has a high-spin d(6) (S=2) configuration. The β-phase exhibits magnetoelectric coupling. |
| تدمد: | 1521-3773 1433-7851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39a06de76a9082e43d3b33e0512297d0 https://doi.org/10.1002/anie.201603920 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....39a06de76a9082e43d3b33e0512297d0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213773 14337851 |
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