  The structural properties of additive binary hard-sphere mixtures are
addressed as a follow-up of a previous paper [S. Pieprzyk et al., Phys. Rev. E
101, 012117 (2020)]. The so-called rational-function approximation method and
an approach combining accurate molecular dynamics simulation data, the pole
structure representation of the total correlation functions, and the
Ornstein-Zernike equation are considered. The density, composition, and
size-ratio dependencies of the leading poles of the Fourier transforms of the
total correlation functions $h_{ij} (r)$ of such mixtures are presented, those
poles accounting for the asymptotic decay of $h_{ij} (r)$ for large $r$.
Structural crossovers, in which the asymptotic wavelength of the oscillations
of the total correlation functions changes discontinuously, are investigated.
The behavior of the structural crossover lines as the size ratio and densities
of the two species are changed is also discussed.
