Zeolites A, X and HS were synthesized from natural Iranian Kaolinite by
alkaline fusion,,followed by refluxing the mixture. The transformation of zeolites
X to HS and Y to P were studied at different time intervals by X-ray diffraction
and Scanning Electron Microscopy (SEM). It was revealed that in solution,
zeolites HS and P are more stable than zeolites X and Y respectively