Long-Time Dynamics of Confined Water Molecules Probed by ²H NMR Multiquanta Relaxometry: An Application to Dense Clay Sediments

The structural and dynamical properties of water molecules confined within dense clay sediment are investigated by ²H NMR spectroscopy and multiquanta relaxometry. The relative contribution of both quadrupolar and paramagnetic NMR relaxation mechanisms is evaluated by carefully analyzing the variation of ²H multiquanta NMR relaxation rates as a function of the orientation of the clay sediment within the static magnetic field. The same analysis is successfully applied to ²H multiquanta NMR spin-locking relaxation measurements, significantly increasing the probed dynamical range. That procedure leads to an accurate determination of the average residence time of the water molecule confined within the interlamellar space of the clay lamellae

Additional file 1: of Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms

Data S1. A table listing all parameters, but those listed in Table 1, which were refined during PDF data analysis

Additional file 2: of Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms

Data S2. The sensitivity of calculated XRD patterns to the number of TCMn3+