Volume fractions (horizontal axis) of solid iron (black), liquid iron (red), solid silicates (green) and liquid silicates (yellow) as functions of the relative radius r/R_p(t) (vertical axis). Plotted data show the internal structures at the time when the core formation is completed, i.e. no more iron separation from a matrix with silicates (L1, L2, L3, R1) and for the models without core formation at the time 20 Ma (R2, R3). From left to right the panels correspond to the cases L1, L2, L3, R1, R2 and R3. See Table 11 for further data.