The electrical resistivities of liquid indium, tin and lead have been measured as functions of temperature up to 200–300 °C above their melting points, with an accuracy of ±0.15%. The resistivity of liquid indium was found to be a linear function of temperature but abrupt changes in the temperature coefficient of resistivity were observed for liquid tin and lead. The temperature at which the discontinuity in slope occurred and the absolute resistivity were found to be dependent on purity for liquid tin, but, within the limits of accuracy of the measurement, independent of purity for liquid lead.
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Davies et al. (1970) studied this question.
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