The phase diagram shows the state of water (H2O) under very high pressure (X-axis) and temperature conditions (Y-axis). These conditions apply in the interior of the ice planets Uranus and Neptune ...

Phase equilibrium diagrams are essentially maps of composition, temperature, and, in some cases, pressure space that define regimes for thermodynamic stability for one or more condensed phases. Phase ...

Pressure and temperature span the space for the so-called phase diagram of a substance: ... "In the phase diagram, we can draw the pressure and temperature in the interiors of Uranus and Neptune.