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Octahedral cation distribution in glauconites from Southern Urals by combination of crystal-chemical model and quasi-continuous model-independent quadrupole splitting distributions (QSD) fitted to their Mossbauer spectraстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 февраля 2014 г.
- Авторы: Dainyak L.G., Rusakov V.S., Sukhorukov I.A., Drits V.A.
- Журнал: European Journal of Mineralogy
- Том: 25
- Номер: 3
- Год издания: 2013
- Издательство: E. Schweizerbart'sche Verlagsbuchhandlung
- Местоположение издательства: Germany
- Первая страница: 405
- Последняя страница: 414
- DOI: 10.1127/0935-1221/2013/0025-2275
- Аннотация: Mossbauer spectra of two glauconites, BSH-11 and KUL-1, from the Southern Urals are interpreted by simulation using crystal-chemical modelling and by fitting of quadrupole splitting distribution (QSD). The crystal-chemical modelling is based on X-ray diffraction (XRD) data and includes, as a priori information, individual quadrupole splittings for Fe3+ and for Fe2+ that correspond to specific local cation arrangements (LCA) having certain occurrence probabilities. The latter are provided by two-dimensional octahedral cation distribution using integrated infrared optical densities for bands corresponding to the cation pairs bound to the OH groups. Combination of crystal-chemical modelling and quasi-continuous model-independent QSDs fitted to Mossbauer spectra resulted in cation distributions for which R2+ (Mg, Fe2+) and R3+ (Al, Fe3+) cations occupy one of two structurally independent cis-sites with equal probabilities. The cation distributions obtained are characterized by Fe-clustering,domain structure, and different trends to homogeneous charge dispersion.
- Добавил в систему: Русаков Вячеслав Серафимович