Profile for gravity (solid black line) and radiative accelerations for Ca (solid red line) and Fe (solid green line) for a 1.4 M_⊙ model. The gray region is the convective envelope. The dotted black line indicates the reference envelope mass used for the turbulent mixing calibration from VSA19, and the dashed blue line is the reference envelope mass (ΔM₀ = 2.4 ⋅ 10⁻³ M_⊙) for the maximum accumulation of Ca at the surface of the model.