NMR property of arrayed K clusters in zeolite LTA with Si/Al=1.5

NMR property of 27Al in K-loaded LTA-type zeolite with Si/Al=1.5 is reported. The higher frequency side of the monotonous spectrum of not loaded sample is changed as expanded, only at the higher frequency side, to higher frequency direction by loading of external K. Some NMR parameters, T2 and T2*, of the expanded components are different from those of the original one. Since the potential for external atoms is shallower for the case of Si/Al=1.5 than for that of Si/Al=1.0, the origin of the shift may be attributed to Knight shift by Fermi contact interaction between nuclei and electron from adsorbed K.