Subsequently, the EA of astatine has been measured, and more accurate values for gallium and thallium have been determined. In this work, the goal is not to revisit the effects of higher order correlation, SO coupling etc., but rather to investigate the performance of the aug-cc-pVnZ-PP-F12 basis sets developed in this work and their use in estimating CCSD(T) basis set limits. For this reason, the EAs are reported in kcal mol -1 , rather than eV.