Aluminium environments in mullite and an amorphous sol-gel precursor examined by Al-27 triple-quantum MAS NMR

Authors
Bodart, PR Parmentier, J Harris, RK Thompson, DP
Citation
Pr. Bodart et al., Aluminium environments in mullite and an amorphous sol-gel precursor examined by Al-27 triple-quantum MAS NMR, J PHYS CH S, 60(2), 1999, pp. 223-228
Citations number
30
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN journal
00223697 → ACNP
Volume
60
Issue
2
Year of publication
1999
Pages
223 - 228
Database
ISI
SICI code
0022-3697(199902)60:2<223:AEIMAA>2.0.ZU;2-R
Abstract
The Al-27 triple-quantum MAS spectrum of an amorphous sol-gel precursor of 2:1 type mullite has been compared to those of crystalline 2:1 type mullite and andalusite. For the 2:1 type mullite and its precursor three peaks wer e observed. The true isotropic chemical shifts and the composite quadrupola r parameters were determined. The structural significance of the central pe ak in the spectrum of the precursor material is discussed in the context of the well-known structures of the two other crystalline phases. (C) 1998 El sevier Science Ltd. All rights reserved.