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Mixed-valence hydrated iron fluoridotitanate: Synthesis, optics and calorimetry
Автор | Mel'Nikova, S. V. | |
Автор | Laptash, N. M. | |
Автор | Gorev, M. V. | |
Автор | Pogoreltsev, E. I. | |
Дата внесения | 2021-08-13T09:33:38Z | |
Дата, когда ресурс стал доступен | 2021-08-13T09:33:38Z | |
Дата публикации | 2020 | |
Библиографическое описание | Mel'Nikova, S. V. Mixed-valence hydrated iron fluoridotitanate: Synthesis, optics and calorimetry [Текст] / S. V. Mel'Nikova, N. M. Laptash, M. V. Gorev, E. I. Pogoreltsev // Journal of Physics and Chemistry of Solids. — 2020. — № 142. — С. 109444 | |
ISSN | 00223697 | |
URI (для ссылок/цитирований) | https://www.sciencedirect.com/science/article/pii/S0022369719327921?via%3Dihub | |
URI (для ссылок/цитирований) | https://elib.sfu-kras.ru/handle/2311/142950 | |
Описание | Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала. | |
Аннотация | Mixed-valence hydrated fluoridotitanate with idealized formula FeTiF6·6H2O is the main product of fluoride processing of natural mineral ilmenite with hydrofluoric acid. Its single crystals were grown and optical and calorimetric experiments were carried out in the temperature range 200–350 K. Charge re-distribution, Fe2+Ti4+ to Fe3+Ti3+, in the compound studied was evident in XPS spectra. A first order ferroelastic phase transition occurs at temperatures T0↓ = 271.5 K, T0↑ = 274 ÷ 275.5 K with the symmetry change P3‾↔ P1‾. The structural transformation is accompanied by the appearance of a very weak optical anisotropy in the slice (001), a small anomaly of the heat capacity (ΔS = 1.5 J/mol K = 0.2R), and positive baric coefficients dT0/dp ≈ 30 ± 10 K/GPa. © 2020 Elsevier Ltd | |
Тема | crystal growth | |
Тема | fluoridotitanate | |
Тема | heat capacity | |
Тема | mixed valence | |
Тема | optical properties | |
Тема | phase transition | |
Название | Mixed-valence hydrated iron fluoridotitanate: Synthesis, optics and calorimetry | |
Тип | Journal Article | |
Тип | Published Journal Article | |
Страницы | 109444 | |
Дата обновления | 2021-08-13T09:33:38Z | |
DOI | 10.1016/j.jpcs.2020.109444 | |
Институт | Институт инженерной физики и радиоэлектроники | |
Подразделение | Кафедра теплофизики | |
Журнал | Journal of Physics and Chemistry of Solids | |
Квартиль журнала в Scopus | Q2 | |
Квартиль журнала в Web of Science | Q2 |