Na NMR Study of NASICON - type Compounds ,
نویسندگان
چکیده
The structure of NASICON-type compounds, Nai+xScxTi2_z(P04)3 (0 < x < 2), and the dynamics of Na have been investigated by Na NMR spectroscopy. It was found that the Na ID and 2D MQMAS spectra depend on the Na concentration, suggesting strongly that the Na ions are distributed between two crystallographically nonequivalent sites, one is a special position with axial symmetry, and the other a position of low symmetry. The chemical exchange between these different sites in the crystal takes place at room temperature, which may cause the high Na ion conduction of this material.
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