Stability limits against vaporization of some refractory compounds formed from an oxygen-rich element mixture with cosmic standard element abundances, and of solid SiO. Dashed line: typical pressure-temperature combinations in an outflowing gas element for a stellar wind model with stationary outflow and Ṁ = 5 × 10^-6 M_⊙ yr^-1 (here for an M-star). Most parts of the dust condensation occur around the knee where the velocity turns from subsonic (horizontal part of the curve) to highly supersonic (steep descending part of the curve) outflow. Pressures are typically 10^-8 bar to 10^-10 bar in the region of main dust growth.