AL ENVIRONMENT IN TECTOSILICATE AND PERALUMINOUS GLASSES: A 27AL MQ-MAS NMR, RAMAN, AND XANES INVESTIGATION
- 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 | Neuville D.R. | |
dc.contributor.author | Cormier L. | |
dc.contributor.author | Massiot D. | |
dc.date.accessioned | 2022-03-19T11:05:20Z | |
dc.date.available | 2022-03-19T11:05:20Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=12090391 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2004, 68, 24, 5071-5079 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/36426 | |
dc.description.abstract | Tecto-aluminosilicate and peraluminous glasses have been prepared by conventional and laser heating techniques, respectively, in the CaO-Al2O3-SiO2 system. The structure of these glasses were studied using Raman spectroscopy, X-ray absorption at the Al K-edge and 27Al NMR spectroscopy with two different high fields (400 and 750 MHz). Raman spectroscopy and X-ray absorption are techniques sensitive to the network polymerization and, in particular, show different signal as a function of silica content. However, these two techniques are less sensitive than NMR to describe the local aluminium environment. For tectosilicate glasses, aluminium in five-fold coordination, [5]Al, was found and a careful quantification allows the determination of a significant amount of [5]Al (7% in the anorthite glass). The proportion of [5]Al increases for the peraluminous glasses with small amounts (<2%) of six-fold coordination, [6]Al. The presence of [5]Al agrees with previous observations of the existence of nonbridging oxygens (NBOs) in tectosilicate compositions. However, the proportion of [5]Al in the present study indicates that no major proportion of triclusters (oxygen coordinated to three (Si,Al)O4 tetrahedra) is required to explain these NBOS. | |
dc.title | AL ENVIRONMENT IN TECTOSILICATE AND PERALUMINOUS GLASSES: A 27AL MQ-MAS NMR, RAMAN, AND XANES INVESTIGATION | |
dc.type | Статья |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru