T2 Polarizability components (α ⊥ and α ∥ ) and invariants (ᾱ and γ) of HF calculated with CCSD(T) methodology and aug-cc-pwCVQZ AO basis. All values are in atomic units. . . . . . . . . . . . . . . . . . . T3 Polarizability components (α ⊥ and α ∥ ) and invariants (ᾱ and γ) of HF calculated with with CCSD(T) methodology and aug-cc-pwCVQZ AO basis, along with one 5p4d3f bond-function basis. All values are in atomic units. For more details on the exponents of the bond-functions and their location, refer to the Sec.