Differences between the equatorial and polar radii as a function of the thickness of the hydrated silicate layer for the broad parametric space described in Table 5 . Each dot corresponds to one model, and the dot separation shows the discretization used in the calculation. The blue dots correspond to models with a salt and phyllosilicate density below 1500 kg/m³, the green points to a density between 1500 kg/m³ and 2000 kg/m³, and red points to a density equal to 2000 kg/m³.