Cation self-diffusion parameters in non-aqueous solvents were measured in zeolite X and in Y zeolites with Si/Al ratios of 1.86 or 2.60 (table 48). The effect of variations in solvent media upon the diffusion of Ca2+, Sr2+ and Ba2+ in methyl and ethyl alcohols was also studied.

The Mobility of Cations in Synthetic Zeolites with the Faujasite Framework - III: Self-Diffusion of Cations into X and Y Zeolites from Non-Aqueous Solutions. A.Dyer, R.B.Gettins: Journal of Inorganic and Nuclear Chemistry, 1970, 32[7], 2401–10