Abstract
1H, 23Na and 31P spin-lattice relaxation times in the laboratory frame and the 1H spin-lattice relaxation time in the rotating frame have been measured as a function of temperature (295 ⩾ T ⩾ 100K) in polycrystalline Na2C6H11O9. 3·5H2O. In addition the proton second moment has also been measured over the same temperature region. The results show that the glucose 1-phosphate molecule is stationary over the entire temperature region while the water molecules execute twofold reorientations. The relaxation of the 31P nuclei is via the proton spin reservoir while the 23Na nuclei relax by means of the quadrupolar mechanism.
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