Title: Ordered End-Member of ZSM-48 Zeolite Family
Authors: Kirschhock, Christine ×
Liang, D
Van Tendeloo, G
Fecant, A
Hastoy, G
Vanbutsele, Gina
Bats, N
Guillon, E
Martens, Johan #
Issue Date: Jan-2009
Publisher: American Chemical Society
Series Title: Chemistry of Materials vol:21 issue:2 pages:371-380
Abstract: ZSM-48 and related zeolites are considered to be highly disordered structures. Different polytypes can be clearly distinguished by simulation of high-resolution electron microscopy images. Synthesis of phase-pure polytypes was attempted. One of the investigated samples crystallized via seeding designated as COK-8 consisted of nanoscopic, needlelike crystals with a very large length/width ratio, growing along the pore direction. These specimens are phase-pure polytype 6 (PT6, numbering according to Lobo and van Koningsveld). Aggregates of these nanoneedles occasionally contained a second polytype: PT1. The latter polytype occurred more abundantly in larger crystal rods in an IZM-1 sample crystallized in ethylene glycol. Here too, the isolated crystallites mainly consist of large, defect-free regions of PT6. A simulation of polytype lattice energies offers a rational explanation for the observed polytypical intergrowth formation.
ISSN: 0897-4756
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
Microbial and Molecular Systems - miscellaneous
× corresponding author
# (joint) last author

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