Temperature and bulk disk C/O range at which the abundance of solid MgS, SiC, CaS, and Al₂O₃ exceeds 10⁻⁷n_H, where n_H is the molar H abundance of the gas. These solids form the primary condensates in high-C/O disks of the rock-forming elements Ca, Al, Mg, and Si, and of S. Condensation temperatures for these elements (red) are highly correlated with most of these condensate stability fields. Vertical green lines indicate transitions in T_C behaviour, as detailed in Sect. A, and elements with constant T_C at high C/O display the value of T_C as a horizontal black line.