title: Intergrowth of components and ramps in coffin-shaped ZSM-5 zeolite crystals unraveled by focused ion beam-assisted transmission electron microscopy.
abstract: Scanning electron microscopy, focused ion beam (FIB), and transmission electron microscopy are combined to study the intergrowth of 90° rotational components and of ramps in coffin-shaped ZSM-5 crystals. The 90° rotational boundaries with local zig-zag features between different intergrowth components are observed in the main part of crystal. Also a new kind of displacement boundary is described. At the displacement boundary there is a shift of the unit cells along the boundary without a change in orientation. Based on lamellae prepared with FIB from different positions of the ramps and crystal, the orientation relationships between ramps and the main part of the crystal are studied and the three-dimensional morphology and growth mechanism of the ramp are illustrated.
authors.affiliation: EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Jiangbo
authors.initials: J
authors.lastname: Lu
authors.affiliation: COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium.
authors.forename: Maarten B J
authors.initials: MB
authors.lastname: Roeffaers
authors.affiliation: COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium.
authors.forename: Evelyne
authors.initials: E
authors.lastname: Bartholomeeusen
authors.affiliation: COK, KU Leuven, Kasteelpark Arenberg 23, B-3001 Heverlee, Belgium.
authors.forename: Bert F
authors.initials: BF
authors.lastname: Sels
authors.affiliation: EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Dominique
authors.initials: D
authors.lastname: Schryvers