Self-diffusion parameters were measured for Ca2+, Sr2+ and Ba2+ cations in the synthetic zeolite ZK4 (table 57). The anomalous nature of Ba2+ migration was noted, and comparisons were made with ionic movement in A and X zeolites and in chabazite.

The Self-Diffusion of Cations in Synthetic Zeolite ZK4. A.Dyer, R.B.Gettins: Journal of Inorganic and Nuclear Chemistry, 1970, 32[1], 319–27

Figure 18

Conductivity of Y-Type Zeolite

(a: dc conductivity, b: ac conductivity)