(Colour online) Lithium abundance yield obtained from our SPH models as a function of radius in the post-merger object. The abundances are represented as logarithmic abundances relative to solar values i.e.,  [Li]  = log ₁₀((Li)/(Li)_⊙) and (Li) is the mass fraction of lithium. R/R_⊙ represents the radius in units of solar radii. The solid black line represents the radial lithium abundance resulting from the merging of solar metallicity stars, while the dashed red line represents that of Z = 1 × 10^-5 stars. The single point with error bars represents the range of observed lithium abundances in R CrB stars (see Jeffery et al. 2011, and references therein).