文摘
In compound Li1.3Al0.3Ti1.7(PO4)3, the investigation by solid state NMR of the T1 and T2 relaxation times of 27Al and 31P nuclei are used to study, versus temperature, the local dynamic properties at different lattice points. Our results can be summarized in the following way: (i) Inside the NASICON framework, these two nuclei do not undergo any diffusion motion. (ii) The motion of the skeleton M(IV)(PO4)3 induces fluctuations in the P–O and Al–O bonds, giving rise to quadrupolar fluctuations for 27Al and chemical shift fluctuations for 31P. (iii) The static distortions induced by these motions allow an explanation of some structural aspects.