Abstract
An analysis of helium and neon transport in vitreous silica is consistent with a statistically distributed structure of the random network. The jump distance, d, for diffusion in common borosilicate glass is greater than in vitreous silica due to the additional modifier ions, Na+. The addition of Na+ or K+ to a silicate structure produces an increase in d. The vibrational frequencies for a gas atom in a “doorway” (v*) and in a solubility site (v) indicate structural trends such as phase separation.
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