Average ratio of atoms O^ices in volatile molecules of planets relative to atoms O^all in all solid components as a function of the solid mass of planets and final semi-major axis a_pl, for non-irradiated (left panel) and irradiated (right panel) models, both with (upper panel) and without (lower panel) refractory organics, taking into account all chemical variations (CO:CO₂ variation and clathrate formation).