Impact of soda-lime borosilicate glass composition on water penetration and water structure at the first time of alteration

Long-term alteration of basaltic glass: Mechanisms and rates

“…Apparent diffusion coefficients of water in pristine basaltic glass as a function of temperature and pH were measured during short term experiments using the same method as Rebiscoul et al (2007Rebiscoul et al ( , 2012. These diffusion coefficients can be compared to those obtained previously to determine if the passivation occurs in the hydrated glass or in the alteration layer.…”

“…These were obtained from the fits of the experimental curves using the Firefx4c_6 software (Ober, raymond.ober@college-de-france.fr) based on the Parratt algorithm (Parratt, 1954) adjusting the electron densities of n layers on a substrate. For our samples, we used the model proposed by Rebiscoul et al (2007Rebiscoul et al ( , 2012 given uncertainties of ±3 Å for the thickness. Regarding the numerous fitting results obtained in this study, we will only present the total thickness of the altered zone.…”

Alteration of synthetic basaltic glass in silica saturated conditions: Analogy with nuclear glass

“…Calcium, which is present in ISG but not in CJ1 glass, also has a strong effect on the diffusivity of the pristine glass and thus on its resistance to hydrolysis. Adding just a small amount of calcium (3 wt.% calcium oxide) reduces the water diffusion coefficient in the pristine glass by two orders of magnitude (Chave et al, 2011;Rebiscoul et al, 2012).…”

Water diffusion in Zr‐containing fiberglass materials at room temperature

“…The low‐temperature processes of water diffusion in glass represent an interest for nuclear and natural glasses community, since the glasses are used as matrices for the storage of toxic wastes such as spent nuclear fuel and water is expected to alter glass and allow the migration of soluble radionuclides . A set of water diffusion coefficients was determined by researchers for basaltic and nuclear glasses . The diffusion coefficients of H 2 O and D 2 O in nuclear glasses (at 50°C) calculated from the equation based on the first Fick law were between 10 −15 and 10 −17 cm 2 /s depending on the glass composition and pH of altering solution .…”

“…coefficients was determined by researchers for basaltic and nuclear glasses. [13][14][15] The diffusion coefficients of H 2 O and D 2 O in nuclear glasses (at 50°C) calculated from the equation based on the first Fick law were between 10 −15 and 10 −17 cm 2 /s depending on the glass composition and pH of altering solution. 10 The coefficients of water diffusion in the borosilicate glass (at 50 and 90°C) determined by modeling of the experimental data were found to be from 2 × 10 −16 to 6 × 10 −19 cm 2 /s.…”