Fig. 4: Schematic of investigated interiors of magma ocean worlds.
From: Shock compression of FeOOH and implications for iron-water interactions in super-earth magma oceans

Case A is the reference case of an iron-free silicate mantle, a pure iron core, and a water steam envelope on top. Case B has the same bulk composition as case A. Case B allows for the water to be dissolved in mantle melt and in the core13. Case C includes the formation of FeOOH and FeH by the reaction of water and iron. White dashed line in case C denotes 86 GPa. The formation of FeOOH is considered for pressures above 86 GPa while the formation of FeO is considered for pressures below 86 GPa (see the main text).