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Mӧssbauer study of Fe-rich berylтезисы доклада
- Авторы: Balatskiy D.V., Dedushenko S.K., Gritsenko Yu D Perfiliev Yu D.
- Сборник: Hyperfine Interactions, 37th International Conference on the Applications of the Mössbauer Effect, ICAME 2022
- Тезисы
- Год издания: 2022
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 43
- Последняя страница: 44
- Номер статьи: 14
- Аннотация: Colored beryls are of considerable interest to the jewelry industry because of their high refractive index and rich color. Synthetic beryls are used in optical engineering. Iron is a typical impurityin natural beryls. The color of the mineral is associated not only with the total amount of iron, but also with the ratio of ferric and ferrous iron as well as their positions in the crystal lattice. Mössbauer spectroscopy is the optimal method for determining this parameter. The routine analysis of the Mössbauer spectra of beryls is complicated by the fact that the components of the spectrum (doublets) can be asymmetric [1]. The figure shows the room-temperature Mössbauer spectrum a Fe-rich beryl sample from Pamir containing about 5 wt.% of iron, which we have characterized in detail by several techniques.The spectrum can be satisfactorily described by an asymmetric doublet of iron(II) and a symmetric doublet of iron(III); These parameters are consistent with those known for beryls [2]. However, the accuracy of their determination is not satisfactory from a practical point of view. It is known that the asymmetry may reversibly disappear at low (<14K) and high temperatures (>500oC) [2]. This can be used to simplify modeling.
- Добавил в систему: Гриценко Юлия Дмитриевна