Abstract:
The infrared spectra of zeolites X and Y were recorded in the hydroxyl stretching region under
high resolution conditions. The samples varied in their Al and proton content. The spectra were
broken down into six different components. The selection of this number of components was
based on reproducible details appearing in the high resolution spectra. An assignment for the
different components is proposed, which considers the four different types of oxygen ions as possible
sites for proton location. The narrow band at 3650 enr1 is assigned to Ch—H hydroxyl groups,
while the broad and asymmetric band at 3550 cm-1 contains components due to O2—H, O3—H
and O4—H groups.
