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This article presents the results of conductivity and density measurements of liquid, gaseous, and supercritical mercury up to 1700^ and 2100 bar. Beyond the critical temperature of 1490^ the conductivity varies continuously from 10^-4 to 10^2 ^-1 cm^-1 if the density is increased from 2 to 6 g/cm^3. This variation is an example of nonmetal-metal transition and is discussed accordingly. The activation energy of conductivity in the supercritical fluid decreases markedly with increasing density and approaches very small values around 5 g/cm^3. Conductivity data for dense gaseous mercurycesium mixtures are given.
Hensel et al. (Tue,) studied this question.
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