抄録
31P MAS-NMR spectrum of β-Cd3(PO4)2 shows resonances attributed to the inequivalent crystallographic sites in the monoclinic unit cell. Double-quantum 31P MAS-NMR analysis of β-Cd3(PO4)2 shows that reliable data can be obtained for the detection of isolated PO43- tetrahedra. Distances up to 0.56 nm can be probed. However it provides only qualitative information on the spatial proximity of like-phosphorus tetrahedra. No information can be obtained on the spatial proximity of unlike-phosphorus tetrahedra, because too many spins contribute to the signal intensity.
