A TRANSMISSION ELECTRON-MICROSCOPY STUDY OF GRAIN-BOUNDARIES IN ZEOLITE-L

被引：12

作者：

DEGRUYTER, CB ^{[1
]}

VERDUIJN, JP ^{[1
]}

KOO, JY ^{[1
]}

RICE, SB ^{[1
]}

TREACY, MMJ ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,ANNANDALE,NJ 08801

来源：

ULTRAMICROSCOPY | 1990年 / 34卷 / 1-2期

关键词：

D O I：

10.1016/0304-3991(90)90064-S

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

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. © 1990.

引用

页码：102 / 107

页数：6

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