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Mossbauer study on the state of iron atoms in natural and synthetic silicate glasses: Method of reconstructing the distribution functions of the hyperfine interaction parametersстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Rusakov V.S., Kotel'nikova A.A., Bychkov A.M.
- Журнал: Glass Physics and Chemistry
- Том: 25
- Номер: 4
- Год издания: 1999
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 352
- Последняя страница: 358
- Аннотация: The synthetic glasses of composition 1.2K(2)O . Fe(2)O(3). 9.2SiO(2) and CaO . FeO . SiO(2) and also tengizites (glasses formed as a result of oil fire, which are close in composition to intermediate magmatic rocks) are studied by the Mossbauer spectroscopy. It is demonstrated that the Fe(3+) and Fe(2+) ions in glasses can exhibit tetrahedral and octahedral coordinations with various degrees of polyhedron distortion, which can lead to the change in the effective coordination number. For the same chemical composition and coordination environment, the mean Fe-O bond length increases in going from the crystalline state to the vitreous state. The nearest cationic environment of the Fe(3+) ions can involve various sets of atoms with different valence. In this case, in the presence of bivalent iron ions, the number of these sets is larger for the octahedral site. For a specific oxidation state of iron, the change in the temperature of melt formation does not bring about the change in the coordination state.
- Добавил в систему: Русаков Вячеслав Серафимович