EFFECTS OF CHEMICAL COMPOSITION AND TEMPERATURE OF HEATING ON THE INFRARED SPECTRA OF LI-SATURATED DIOCTAHEDRAL SMECTITES. (I) MID-INFRARED REGION
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Madejova J. | |
dc.contributor.author | Bujdak J. | |
dc.contributor.author | Petit S. | |
dc.contributor.author | Komadel P. | |
dc.date.accessioned | 2021-01-29T07:14:09Z | |
dc.date.available | 2021-01-29T07:14:09Z | |
dc.date.issued | 2000 | |
dc.identifier | https://elibrary.ru/item.asp?id=13836765 | |
dc.identifier.citation | Clay Minerals, 2000, 35, 5, 739-751 | |
dc.identifier.issn | 0009-8558 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/24034 | |
dc.description.abstract | Diffuse reflectance spectra in the near-infrared region are presented for Li-saturated smectites heated up to 200°C. The smectites included three montmorillonites, an Fe-beidellite and a ferruginous smectite. Unheated samples showed a complex band near 7060 cm-1 assigned to the first overtone of the OH-stretching mode of structural hydroxyl groups and bound H2O. The OH combination bands appeared in the 4600 4300 cm-1 region. Spectra of heated montmorillonites showed an upward shift and splitting of the OH-overtone band into two components near 7170 and 7110 cm-1. The presence of a band near 7170 cm-1, assigned to the overtone of the AlMgLiOH-stretching vibration, implied that local trioctahedral domains were created upon Li(I) fixation in the previously vacant octahedral positions of montmorillonites. The OH combination bands were shifted to higher frequencies and a new band appeared near 4472 cm-1 in the spectra of montmorillonites heated to temperatures in excess of 130°C. No features indicating Li(I) in the structure of Fe-beidellite or ferruginous smectite were observed in the NIR spectra. | |
dc.title | EFFECTS OF CHEMICAL COMPOSITION AND TEMPERATURE OF HEATING ON THE INFRARED SPECTRA OF LI-SATURATED DIOCTAHEDRAL SMECTITES. (I) MID-INFRARED REGION | |
dc.type | Статья |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru