  We present a model equation of states for expanded metals, which contains a
pressure term due to a screened-Coulomb potential with a screening parameter
reflecting the Mott-Anderson metal-to-nonmetal transition. As anticipated
almost 80 years ago by Zel'dovich and Landau, this term gives rise to a second
coexistence line in the phase diagram, indicating a phase separation between a
metallic and a nonmetallic liquid.
