THE INFLUENCE OF HF ON THE INCORPORATION OF SILICON INTO THE ERIONITE-LIKE ALPO(4)-17 MOLECULAR-SIEVE

Authors
LOHSE U JANCKE K LOFFLER E SCHALLER T
Citation
U. Lohse et al., THE INFLUENCE OF HF ON THE INCORPORATION OF SILICON INTO THE ERIONITE-LIKE ALPO(4)-17 MOLECULAR-SIEVE, Crystal research and technology, 29(2), 1994, pp. 237-245
Citations number
12
Categorie Soggetti
Crystallography
Journal title
Crystal research and technology → ACNP
ISSN journal
02321300
Volume
29
Issue
2
Year of publication
1994
Pages
237 - 245
Database
ISI
SICI code
0232-1300(1994)29:2<237:TIOHOT>2.0.ZU;2-O
Abstract
The synthesis of SAPO-17 with high silicon content (up to 18 weight-%) succeeded with the addition of HF to the reaction mixtures. The chara cterization of the samples with chemical analysis. XRD, and adsorption measurements show the incorporation of silicon into tetrahedrally coo rdinated framework positions. Spectroscopic methods (IR, F-19 MAS NMR) demonstrate the presence of fluorine in the as-synthesized samples. T he effect of the fluorine consists in (i) the improvement of the silic on incorporation into framework positions, (ii) the stabilization of t he as-synthesized samples and (iii) the charge compensation of the tem plate ion by F-.