Fully relativistic X-ray scattering factors for 305 chemically relevant cations, six monovalent anions (O−, F−, Cl−, Br−, I−, At−), the excited (valence) ns1np3 states of carbon and silicon, and five exotic cations for atoms with Z > 104 (Db5+, Sg6+, Bh7+, Hs8+ and Cn2+) have been determined in the 0 ≤ sin θ/λ ≤ 6 Å−1 range using one-electron wavefunctions evaluated via the B-spline Dirac–Hartree–Fock method of Zatsarinny & Froese Fischer [Comput. Phys. Comm. (2016), 202, 287–303]. The study also reports the analytical conventional and extended interpolating functions for the 0–2 and 2–6 Å−1 sin θ/λ intervals and includes a thorough comparison with results from the earlier investigations.