The l-mixing formalism provides an alternative perspective on this effect. The generalized Hanstorp coefficients depend on radial integrals of orbital functions scaled by high powers of r, amplifying the effect of diffuse orbital tails on the resulting PADs. If hydrogenic radial functions are used, the B2 coefficient in eqn (2) scales as 𝐵 ∝ 𝜁 /𝜁 , where 𝜁 and 𝜁 are the effective charges introduced in Sec. 4.1. While the appearance of the orbitals in Fig. is defined mainly by their dominant d character, a major effect on the () curve comes from the long-range scaling of the more diffuse (𝜁 𝜁 ) and relatively minor p component of the orbital, described by 𝜁 .