A transmission electron microscopy study of grain boundaries in zeolite L

C. B. de Gruyter; J. P. Verduijn; J. Y. Koo; S. B. Rice; M. M.J. Treacy

doi:10.1016/0304-3991(90)90064-S

A transmission electron microscopy study of grain boundaries in zeolite L

C. B. de Gruyter, J. P. Verduijn, J. Y. Koo, S. B. Rice, M. M.J. Treacy

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

TEM studies of a platelet form of zeolite L reveal two common types of grain boundary. The first involves an arbitrary translation, without rotation, between adjacent grains. The second involves a 30° relative rotation about the 6-fold c-axis, parallel to the platelet normal. The resulting 30° tilt boundaries have no periodic structure since the adjoining lattices are incommensurate. Occasionally, 30° twist boundaries are observed. These occur only in the vicinity of 30° tilt boundaries, and appear to be outgrowths anchored by one of the grains. In plan view, the 30° twist boundaries exhibit aperiodic moiré patterns generated by the incommensurate overlying hexagonal nets. Such overlayers can block about 90% of the intersected channels of the one-dimensional pore system of zeolite L.

Original language	English (US)
Pages (from-to)	102-107
Number of pages	6
Journal	Ultramicroscopy
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/0304-3991(90)90064-S
State	Published - Nov 1990
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Instrumentation

Access to Document

10.1016/0304-3991(90)90064-S

Cite this

@article{395c28f3dedc4a7c880452ff4c4e4ec3,

title = "A transmission electron microscopy study of grain boundaries in zeolite L",

abstract = "TEM studies of a platelet form of zeolite L reveal two common types of grain boundary. The first involves an arbitrary translation, without rotation, between adjacent grains. The second involves a 30° relative rotation about the 6-fold c-axis, parallel to the platelet normal. The resulting 30° tilt boundaries have no periodic structure since the adjoining lattices are incommensurate. Occasionally, 30° twist boundaries are observed. These occur only in the vicinity of 30° tilt boundaries, and appear to be outgrowths anchored by one of the grains. In plan view, the 30° twist boundaries exhibit aperiodic moir{\'e} patterns generated by the incommensurate overlying hexagonal nets. Such overlayers can block about 90% of the intersected channels of the one-dimensional pore system of zeolite L.",

author = "{de Gruyter}, {C. B.} and Verduijn, {J. P.} and Koo, {J. Y.} and Rice, {S. B.} and Treacy, {M. M.J.}",

year = "1990",

month = nov,

doi = "10.1016/0304-3991(90)90064-S",

language = "English (US)",

volume = "34",

pages = "102--107",

journal = "Ultramicroscopy",

issn = "0304-3991",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - A transmission electron microscopy study of grain boundaries in zeolite L

AU - de Gruyter, C. B.

AU - Verduijn, J. P.

AU - Koo, J. Y.

AU - Rice, S. B.

AU - Treacy, M. M.J.

PY - 1990/11

Y1 - 1990/11

N2 - TEM studies of a platelet form of zeolite L reveal two common types of grain boundary. The first involves an arbitrary translation, without rotation, between adjacent grains. The second involves a 30° relative rotation about the 6-fold c-axis, parallel to the platelet normal. The resulting 30° tilt boundaries have no periodic structure since the adjoining lattices are incommensurate. Occasionally, 30° twist boundaries are observed. These occur only in the vicinity of 30° tilt boundaries, and appear to be outgrowths anchored by one of the grains. In plan view, the 30° twist boundaries exhibit aperiodic moiré patterns generated by the incommensurate overlying hexagonal nets. Such overlayers can block about 90% of the intersected channels of the one-dimensional pore system of zeolite L.

AB - TEM studies of a platelet form of zeolite L reveal two common types of grain boundary. The first involves an arbitrary translation, without rotation, between adjacent grains. The second involves a 30° relative rotation about the 6-fold c-axis, parallel to the platelet normal. The resulting 30° tilt boundaries have no periodic structure since the adjoining lattices are incommensurate. Occasionally, 30° twist boundaries are observed. These occur only in the vicinity of 30° tilt boundaries, and appear to be outgrowths anchored by one of the grains. In plan view, the 30° twist boundaries exhibit aperiodic moiré patterns generated by the incommensurate overlying hexagonal nets. Such overlayers can block about 90% of the intersected channels of the one-dimensional pore system of zeolite L.

UR - http://www.scopus.com/inward/record.url?scp=0025514053&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025514053&partnerID=8YFLogxK

U2 - 10.1016/0304-3991(90)90064-S

DO - 10.1016/0304-3991(90)90064-S

M3 - Article

AN - SCOPUS:0025514053

SN - 0304-3991

VL - 34

SP - 102

EP - 107

JO - Ultramicroscopy

JF - Ultramicroscopy

IS - 1-2

ER -

A transmission electron microscopy study of grain boundaries in zeolite L

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this