When considering orbital basis sets augmented with extra diffuse functions, the usual approach to constructing matching MP2Fit ABSs is to take the existing ABS and optimize one additional diffuse primitive for each angular symmetry in that ABS. For example, the cc-pVTZ-MP2Fit basis for Ge contains functions with s-h angular momentum, hence aug-cc-pVTZ-MP2Fit adds one additional primitive for each of s-h. The exponents of these additional primitives are optimized for the ground state of the anions of the atom by minimizing the objective function: