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Hydration of AlPO4-11 studied with x-ray powder diffraction and aluminum-27 and phosphorus-31 NMR
The Journal of Physical Chemistry
The influence of water adsorption in AlP04-11 has been studied with X-ray powder diffraction and 27AI and 3IP NMR. With X-ray powder diffraction, a change of the crystal symmetry from ZMA2 to PNA2, is observed upon water adsorption, resulting in a diminished unit-cell volume and more elliptical pores. N M R was used to study the hydration on an atomic scale. With 27Al double rotation (DOR) and magic angle spinning (MAS) NMR, the quadrupole coupling constants (CQ) and asymmetry parameters (7) ofdoi:10.1021/j100122a030 fatcat:qxpb62ciyffzrdodnfhepfpim4