Comparison of the temperature, pressure, and SiO mass mixing ratio profiles of a planet with M_pl = 0.8 M_⊕ for three different treatments of the opacity. The model “g+1xd” corresponds to the nominal case. In model “g+10xd”, the dust contribution is increased by a factor 10. In model “g”, the gas is the only opacity source considered. Due to the larger outer isothermal region in model “g”, the temperature in the envelope is lower than in the other models while the pressure is higher.