ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of the self-diffusion coefficients in molten binary nitrate mixtures

H. H Emons, G. Braeutigam, and A. Winzer

Sekt. Chem., Anorg.-Tech. Chem., Tech. Hochsch. 'Carl Schorlemmer', Merseburg, Ger. Dem. Rep.

Abstract:  The self-diffusion coefficients of ²²Na⁺ in NaNO₃ and in the NaNO₃—RbNO₃, NaNO,—Sr(NO₃)₂ , and NaNO.— Ba(NO₃)₂ mixtures and those of ⁸⁶Rb⁺ in RbNO, and in the NaNO₃—RbNO₃ mixture were determined by means of the capillary method ("inward" diffusion, quartz capillaries). The self-diffusion coefficients and the activation energies of Na⁺ in NaNO₃ and Rb⁺ in RbNO₃ agree within the experimental error with the values determined by other methods. The addition of rubidium nitrate or of alkaline earth metal nitrate to the pure sodium nitrate involves a decrease of the Na + self-diffusion coefficients in the series RbNO₃ < Sr(NO₃)₂ < Ba(NO₃)₂ .

Full paper in Portable Document Format: 326a776.pdf (in German)

Chemical Papers 32 (6) 776–786 (1978)