Abstract
The diffusion of lead isotopes Pb/sup 210/ and Pb/sup 212/ in lead metasilicate glass was measured in the range 300 to 600 deg C, and the activation energy for self-diffusion was found to be 24.8 kcal. A comparative discussion of previously published values for cation mobility in crystallized, glassform, and molten silicates of Pb and Na is given. In the case of Pb metasilicates, a great similarity between the glass-form and the molten condition with respect to ionic mobility can be shown through comparison of cation selfdiffusion in the crystallized or glass-form material to ionic conductivity measurements on melts. (tr-auth)
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