Arrangement and dynamics of water in natural zeolites

Elastic, inelastic and quasielastic neutron scattering experiments are performed on natural zeolites. Hydrogen atoms at the water molecules could be located in the fibrous zeolites natrolite and edingtonite. Inelastic neutron spectra can be divided into translational (δE < 40 meV) and librational motion (40 - 100 meV) in the case of harmotome. The analysis of quasielastic scattering in partially dehydrated samples gave diffusion constants of about 8.10-5 cm sec-1 at T = 295 K for the full amount of water. (author) 6 refs., 4 figs., 1 tab