Diffusion of alkali metal impurities in sodium and potassium
- 1 December 1967
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 16 (144) , 1139-1146
- https://doi.org/10.1080/14786436708229964
Abstract
The diffusion of 42K and 86Rb in sodium and 22Na in potassium has been measured between 0°c and the melting points. The diffusion coefficients are given by the equations, where the activation energies are in kcal mol−1 and Reasons are given for believing that diffusion is by vacancies. The results are discussed in terms of Le Claire's screened electrostatic and Swalin's elastic interaction theory of impurity diffusion. Some anomalous results obtained close to the melting point in potassium containing ∼ 1 at. % sodium are interpreted as being due to diffusion in molten regions of the specimen.Keywords
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