A theoretical investigation was made of the diffusion of atomic hydrogen in crystalline and amorphous silicon dioxide. By means of molecular dynamics simulations, the activation energy and the diffusivity pre-factor were computed for the migration process of atomic hydrogen and the topology of the migration path in relation to the symmetry of the host structure was described. The trap-limited diffusion process in the amorphous phase was also described.

Migration of Atomic Hydrogen in Crystalline and Amorphous SiO2: a Molecular Dynamics Study. Bongiorno, A., Colombo, L., Trioni, M.I.: Journal of Non-Crystalline Solids, 1997, 216, 30-5. See also: Physical Chemistry Chemical Physics, 1997, 101[9], 1229-31