A 2D ~31P MAS NMR Study of Polycrystalline Cd_3(PO_4)_2

摘要

It is demonstrated on a polycrystalline powder sample of Cd_3(PO_4)_2, given a known single-crystal X-ray structure, that two-dimensional ~31P double-quantum single-quantum MAS correlation experiments allow unique assignment of multiple ~31P resonances to specific P sites in the structure of such inorganic orthophosphates. The eigenvalues of the ~31P and ~113Cd shielding tensors of Cd_3(PO_4)_2, are reported, the determination of which requires usage of a 2D MAS spinning sideband separation experiment.