Abstract

The proton nuclear magnetic resonance (NMR) properties of single layer and double layer adsorbed water in a synthetic fluor montmorillonite are discussed. The continuous wave spectrum consists of a doublet and a narrow central line. The former is intrepreted in terms of random jumps between different possible molecular orientations in an ice-like structure. The latter is understood to be caused by molecules in two different sites undergoing different characteristic motions, with exchange occurring between the two sites. The spin-lattice relaxation is analyzed considering the uniaxial rotations which generate the doublet lineshape.

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