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Low-frequency band at 50 cm-1 in the Raman spectrum of cristobalite: identification of similar structural motifs in glasses and crystals of similar compositionстатья Исследовательская статья
Информация о цитировании статьи получена из
Web of Science,
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 ноября 2017 г.
- Авторы: Sigaev V.N., Smelyanskaya E.N., Plotnichenko V.G., Koltashev V.V., Volkov A.A., Pernice P.
- Журнал: Journal of Non-Crystalline Solids
- Том: 248
- Номер: 2
- Год издания: 1999
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 141
- Последняя страница: 146
- DOI: 10.1016/S0022-3093(99)00242-2
- Аннотация: Raman spectra of high-temperature α-cristobalite ceramics and silica glass have been obtained in a wide frequency range from 10 to 1500 cm-1. A low-frequency maximum at 50 cm-1 in the spectrum of cristobalite has been observed to be similar to the well-known band at 52 cm-1 in the Raman spectra of silica glasses. The combination of literature reports on inelastic neutron scattering, low-temperature heat capacity, X-ray and neutron scattering in the region of the first sharp diffraction peak (FSDP) and our data on Raman and far IR spectroscopies indicate a cristobalite-like medium-range order in silica glasses. The comparison of the obtained spectra with the Raman spectrum of α-quartz, as well as the comparison of far IR spectra of some multicomponent glasses with the ones of corresponding crystals, demonstrates that by means of low-frequency spectroscopic data it is possible to identify the crystalline polymorphs reflected by the glass.
- Добавил в систему: Сигаев Владимир Николаевич