To establish a set of baseline values, δ RI and ∆RI were calculated for the neutral atoms using the cc-pVnZ-PP-F12 OBS and matching OptRI ABS. Analogous values were then also computed for the anion of the atoms using the newly developed aug-cc-pVnZ-PP-F12 OBS and the cc-pVnZ-PP-F12-OptRI ABS, with the difference between the two sets of values highlighting any deficiencies in the latter combination. Data for Te is presented in Table as an example, where, perhaps unsurprisingly, it can be seen that for all zeta levels both the metric for the error in integrals and the error in the MP2-F12 correlation energy increase for the anion. The goal in developing an aug-cc-pVnZ-PP-F12-OptRI set then becomes for the anion error metrics to be equivalent to (or better than) those for the neutral atom. TABLE III: RI errors (relative to the reference ABS) when using the cc-pVnZ-PP-F12-OptRI ABS for the neutral and anion Te atom. Calculations on the neutral atom use the cc-pVnZ-PP-F12 orbital basis, while aug-cc-pVnZ-PP-F12 is used for the anion. The values of the integral error metric, δ RI , are expressed as parts per billion (ppb) due to their small size OBS, while the aug-cc-pVDZ-PP-F12 OBS is used for the anion.