Slope anomaly in the vapour pressure curve of Hg
The investigation of normally-metallic fluids at reduced densities has created considerable experimental and theoretical interest. Hensel1 has presented evidence for transitions, related to electronic properties, in both the liquid and vapour phases of Hg, and predicted that these would affect the liquid–vapour transition. We present here evidence that the vapour pressure curve of Hg, p(T), has an unusual and probably unique form in that the In p against 1/T plot showed a sharp change of slope at temperature T = T′ = 1,361 K and saturated liquid density ρL = 10.7 g cm−3. The latter is about the density at which Hensel1 deduced that the electronic mean free path equalled the mean interatomic spacing, and which he took to be associated with the electronic-property related transition in the liquid phase.
Thermodynamic and electrical properties of fluid Hg up to the liquid-vapour critical point
Measurements have been made on fluid Hg in the temperature range 300-1800K and at pressures up to 200 MPa. The authors have measured the vapour pressure, density of saturated liquid and liquid phase isochores, and the electrical conductivity of saturated liquid and vapour. The critical temperature, pressure and density were estimated as 1750K, 172 MPa and 5.8 g cm-3, respectively. It was argued that the low-density limit of the supposed semiconducting region for Hg occurred at the critical density.
Étude des transitions entre états métalliques et isolants. Application aux bandes d'impureté et aux antiferromagnétiques. II
2014 Under definite assumptions, an electron gas in a solid may behave as an insulator, in contradiction to the predictions of band theory. A simple model has been proposed previously. A more careful study gives the same results but shows that besides individual excitations there are two kinds of collective excitations : plasmons and spinons. An application of the model to disordered systems is discussed. LI JOURNAL DE PHYSIQUE ET LE RADIUM TOME 20, AOUT-SEPTEMBRE 1959,