6Li{31P} Rotational-Echo, Double-Resonance Studies of Lithium Ion Site Dynamics in Li3V2(PO4)3

Low-temperature 6Li{31P} rotational-echo, double-resonance (REDOR) measurements were used to study lithium mobility within each of the three Li sites in monoclinic Li3V2(PO4)3. Each of the Li ions was found to experience a different reduced dipolar coupling with the nearest 31P nucleus. Under fast magic-angle spinning (MAS) conditions (40 kHz), the three crystallographic 31P sites in Li3V2(PO4)3 were resolved. On the basis of the known Li−P …