Synthesis and characterization of ZnAPO-34 molecular sieve with CHA structure type

Authors
Gonzalez, G Pina, C Jacas, A Hernandez, M Leyva, A
Citation
G. Gonzalez et al., Synthesis and characterization of ZnAPO-34 molecular sieve with CHA structure type, MICROP M M, 25(1-3), 1998, pp. 103-108
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MICROPOROUS AND MESOPOROUS MATERIALS
ISSN journal
13871811 → ACNP
Volume
25
Issue
1-3
Year of publication
1998
Pages
103 - 108
Database
ISI
SICI code
1387-1811(199812)25:1-3<103:SACOZM>2.0.ZU;2-H
Abstract
Zinc substituted chabazite-like aluminophosphate ZnAPO-34 was synthesized h ydrothermally. Rietveld refinement has been carried out over the X-ray spec trum. Atomic coordinates of the framework were refined assuming the space g roup <(R)over bar 3m>. Results show that Zn2+, P5+ and Al3+ occupy similar tetrahedral sites in the structure. The cell is rhombohedral; in hexagonal coordinates the lattice parameters are: a=13.827(1) Angstrom and c=15.401(3 ) Angstrom. Different crystal shapes have been revealed by scanning electro n microscopy, and the elemental compositions of these crystals show variati ons, especially in their Ca and Zn content, but all of them belong to the s ame solid solution. (C) 1998 Elsevier Science B.V. All rights reserved.