DEALUMINATION OF HEXAGONAL (EMT) CUBIC (FAU) ZEOLITE INTERGROWTH MATERIALS - A SEM AND HRTEM STUDY

Authors
OHSUNA T TERASAKI O WATANABE D ANDERSON MW CARR SW
Citation
T. Ohsuna et al., DEALUMINATION OF HEXAGONAL (EMT) CUBIC (FAU) ZEOLITE INTERGROWTH MATERIALS - A SEM AND HRTEM STUDY, Chemistry of materials, 6(12), 1994, pp. 2201-2204
Citations number
29
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Chemistry of materials → ACNP
ISSN journal
08974756
Volume
6
Issue
12
Year of publication
1994
Pages
2201 - 2204
Database
ISI
SICI code
0897-4756(1994)6:12<2201:DOH(C(>2.0.ZU;2-O
Abstract
SEM and HRTEM have shown that dealumination with ammonium hexafluorosi licate of the EMT and FAU end members leads to defect-free materials w hich have an amorphous layer covering the crystals. In contrast, the d ealumination of EMT/FAU intergrowths yields materials with crevices wh ich penetrate deep into the crystals. It is postulated that these occu r in a highly intergrown region of the crystals. This is the first obs ervation of the detailed effects of dealumination.