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. 2010 Mar 13;368(1914):941–965. doi: 10.1098/rsta.2009.0282

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© 2010 The Royal Society

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 13. — Miscibility gap in the hydrogen–helium system for constant pressures as a function of the hydrogen concentration, y=N_H/(N_H+N_He) (see Lorenzen et al. 2009). The calculated melting temperatures, T_m, of solid helium are indicated on the right-hand side for each pressure. The strong increase in the demixing temperatures occurs at critical hydrogen concentrations y_c, which are in accordance with Mott’s criterion, . We conclude that the thermodynamics that drives the phase separation in the mixture is caused by a continuous non-metal to metal transition in the hydrogen subsystem.

Inline graphic — Miscibility gap in the hydrogen–helium system for constant pressures as a function of the hydrogen concentration, y=N_H/(N_H+N_He) (see Lorenzen et al. 2009). The calculated melting temperatures, T_m, of solid helium are indicated on the right-hand side for each pressure. The strong increase in the demixing temperatures occurs at critical hydrogen concentrations y_c, which are in accordance with Mott’s criterion, . We conclude that the thermodynamics that drives the phase separation in the mixture is caused by a continuous non-metal to metal transition in the hydrogen subsystem.