Conclusions
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1.
The IR spectra of a number of modified type Y zeolites, chabazite, erionite, and mordenite were studied in the region of the vibrations of the crystal framework.
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2.
The region of 550–650 cm−1 is characteristic of all types of zeolites and evidently reflects both the mode of packing of the TO4 tetrahedra and the degree of crystallinity of the zeolite.
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3.
Cation exchange and decationization in the case of high-silica zeolites have practically no influence on the nature of the spectrum in the region of 550–650 cm−1; the dealuminization of mordenite leads to an increase in the intensity and a shift of them into the high-frequency region.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1016–1021, May, 1975.
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Nabiev, B.A., Lafer, L.I., Yakerson, V.I. et al. Infrared spectra of catalysts and adsorbed molecules. Russ Chem Bull 24, 931–935 (1975). https://doi.org/10.1007/BF00922936
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DOI: https://doi.org/10.1007/BF00922936