DEHYDRATION-REHYDRATION BEHAVIOR OF LAYERED DOUBLE HYDROXIDES - A STUDY BY X-RAY-DIFFRACTOMETRY AND MAS NMR-SPECTROSCOPY

Authors
BERES A PALINKO I BERTRAND JC NAGY JB KIRICSI I
Citation
A. Beres et al., DEHYDRATION-REHYDRATION BEHAVIOR OF LAYERED DOUBLE HYDROXIDES - A STUDY BY X-RAY-DIFFRACTOMETRY AND MAS NMR-SPECTROSCOPY, Journal of molecular structure, 410, 1997, pp. 13-16
Citations number
16
Categorie Soggetti
Chemistry Physical
Journal title
Journal of molecular structure → ACNP
ISSN journal
00222860
Volume
410
Year of publication
1997
Pages
13 - 16
Database
ISI
SICI code
0022-2860(1997)410:<13:DBOLDH>2.0.ZU;2-S
Abstract
Mg-Al and Zn-Al double hydroxides were synthesized and their dehydrati on-rehydration behaviour was studied by X-ray diffractometry and Al-27 magic-angle spinning (MAS) NMR spectroscopy. On dehydration the layer ed structure collapsed, but treatment in water resulted in partial rec onstitution of the original structure, Or. heat treatment part of the octahedrally coordinated aluminium, typical of layered double hydroxid es, became tetrahedrally coordinated, On rehydration some of the tetra hedral aluminium became octahedrally coordinated again. (C) 1997 Elsev ier Science B.V.