Harrison's hypothesis on the effect of atomic size of impurities on the electrical resistance is shown to predict the resistance of alkali solutes in liquid sodium to an accuracy as high as the data warrant. The impurity resistance was calculated numerically over a range of assumed dilations. The predicted resistance is not proportional to (ΔVV)² but is approximately fitted by the empirical equation, Δρ=const[bx-1+exp(-bx)], where x=ΔVV. New measurements on Na-K alloys are also reported.
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Ben A. Green (1962) studied this question.
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