133Cs Nuclear Magnetic Resonance Relaxometry as a Probe of the Mobility of Cesium Cations Confined within Dense Clay Sediments

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• 作者：Patrice Porion ; Fabienne Warmont ; Anne Marie Faug猫re ; Anne-Laure Rollet ; Emmanuelle Dubois ; Virginie Marry ; Laurent J. Michot ; Alfred Delville
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 9, 2015
• 年：2015
• 卷：119
• 期：27
• 页码：15360-15372
• 全文大小：659K
• ISSN：1932-7455

文摘

¹³³Cs nuclear magnetic resonance is used to quantify the mobility of cesium counterions confined within the interlamellar space of synthetic Hectorite clay under controlled hydration conditions. The degree of lamellae ordering within the macroscopic clay sediment is determined by analyzing the variation of the ¹³³Cs NMR spectra as a function of the sample orientation in the static magnetic field. Furthermore, a detailed analysis of the ¹³³Cs NMR spectra allows one to determine the order of magnitude of the quadrupolar and heteronuclear dipolar couplings monitoring the NMR relaxation of the cesium cations confined within clay sediments. Finally, a lower limit to the average residence time of the cesium cations within the clay interlamellar space is determined by using ¹³³Cs NMR relaxation measurements under spin-locking conditions.