The angular dependence of the deuteron magnetic resonance line splittings recorded in one plane of rotation of a single crystal of AlCl3sdot;6D2O have been used to establish the quadrupole coupling tensor and determine the deuteron positional coordinates. These coordinates are found to be 0.073, 0.187, 0.143; 0.202, 0.204, and 0.087. Proton relaxation times in polycrystalline AlCl3sdot;6H2O have been measured as a function of temperature to evaluate the dynamic parameters associated with molecular motion. Twofold motion of H2O with an activation energy of 10.0plusmn;0.5 kcal/mole is found to dominate the relaxation process below 385thinsp;deg;K. A second motion with an activation energy of 17.0plusmn;1.0 kcal/mole appears above 385thinsp;deg;K and is likely to be translational diffusion of the water molecules.
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