Non-pulsating models. Top panel: gas number densities (in cm⁻³) as a function of the radial distance. Middle panel: gas temperatures (in K) as a function of the radial distance. Bottom panel: fractional abundances of the prevalent gas-phase molecules H₂O, OH, and CO and the metal oxides and hydroxides MgO, MgOH, CaO, CaOH, AlO, AlOH, and Al₈O₁₂ as a function of the radial distance in the non-pulsating models. Solid lines represent the MIRA model and dashed lines the SRV model.