QINS studies of water diffusion in Na-montmorillonite

被引：16
|
作者：
Gay-Duchosal, M [1 ]
Powell, DH
Lechner, RE
Rufflé, B
机构：
[1] Univ Lausanne, Dept Inorgan & Analyt Chem, CH-1015 Lausanne, Switzerland
[2] Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany
来源：
PHYSICA B | 2000年 / 276卷
关键词：
diffusion; clay; montmorillonite; water;
D O I：
10.1016/S0921-4526(99)01421-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have used quasielastic incoherent neutron scattering (QINS) to study the diffusion of interlayer water in partially orientated Na-montmorillonite samples. In order to observe the anisotropy of the motion we performed measurements for two orthogonal sample orientations and for two different energy resolutions. Fits to the spectra yield phenomenological translational line widths which, for the 135 degrees orientation, can be fitted by a two-dimensional Chudley-Elliott model with a diffusion coefficient D = 1.3 x 10(-9) m(2) s(-1) and a mean square jump distance l = 1.7 Angstrom. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：234 / 235
页数：2
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