Density of H₂O as afunction of pressure and temperature calculated with the collection of H₂O EoS of this work. The various EoS used to generate this plot are listed in Table 1. The solid black lines mark the phase transition between the solid, liquid, and gaseous phase. The white dashed lines are the density contours for the region where the density is below unity. The dot dashed black lines are adiabats calculated for a 5 M_⊕ sphere of pure H₂O for different surface temperatures of 200, 300, and 1000 K.