The Volume of Liquid Hg–Tl and Hg–Cs Alloys

Abstract

The molar volume and the thermal expansion coefficient of liquid Hg–Tl and Hg–Cs alloys were measured by a picnometer method. The molar volume of liquid Hg–Tl alloys varies almost linearly with concentration, and that of liquid Hg–Cs alloys shows large negative deviations from the linear variation. The thermal expansion coefficient of liquid Hg–Cs alloys shows a slight hump in the dilute Cs concentration range. The concentration dependence of the molar volume of these liquid alloys calculated by a simple pseudopotential approach are qualitatively in good agreement with experiment.