Reactions in solid state: Localized and delocalized

Some critical observations about the degradation of glass: The formation of lamellae explained

“…It is a small zone where cations are replaced by protons while the silicate network remains intact. The width of the hydrogen concentration gradient does not appear to be larger than 0.1 -0.2 µm [76,77,78]. For that reason, that layer is not visible with microscopic techniques.…”