I. Hannus et al., DIFFUSION OF SODIUM FROM THE EXTERIOR TO THE INTERIOR SURFACE OF FAUJASITE ZEOLITES EXCHANGED FOR DIFFERENT ALKALINE METAL-IONS, Hyperfine interactions, 99(4), 1996, pp. 409-414
Metallic sodium formed upon thermal decomposition of NaN3 migrates fro
m the external surface of zeolite into its pore system. Interaction ta
kes place between neutral sodium and ionic cesium, too, as proved by E
SR spectroscopy.