NMR-SPECTRA AND THE STRUCTURE OF THE GUEST SUBLATTICE IN THE MONOCATIONIC FORMS OF CLINOPTILOLITE AND HEULANDITE

Citation
Sp. Gabuda et al., NMR-SPECTRA AND THE STRUCTURE OF THE GUEST SUBLATTICE IN THE MONOCATIONIC FORMS OF CLINOPTILOLITE AND HEULANDITE, Journal of structural chemistry, 37(5), 1996, pp. 759-766
Citations number
15
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
ISSN journal
00224766
Volume
37
Issue
5
Year of publication
1996
Pages
759 - 766
Database
ISI
SICI code
0022-4766(1996)37:5<759:NATSOT>2.0.ZU;2-0
Abstract
The H-1 NMR spectra of the hydrated monocationic forms of clinoptiloli te M(6)[Al6Si30O72]. nH(2)O (M = Li Na, IZ Cs, NH4; n = 12-22) and M(3 )'[Al6Si30O72]. nH(2)O (M' = Mg Ca, ST, Ba; n = 20-24) and heulandite M(8)[Al8Si28O72]. 21H(2)O (M = Na, K) are divided into three types dif fering in the symmetry of censors of magnetic dipole-dipole interactio ns of protons in zeolite water molecules. On the basis of model calcul ations it is shown that water molecules in the Cs, K, and Ba forms of clinoptilolite and the K form of heulandite are ordered in structural positions.