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Figure 4
(a) Histogram of the residual electrostatic potential calculated from the difference Fourier synthesis of the NATP-2 crystal on the basis of precession and continuous-rotation data. (b) 3σ[ΔV(r)] levels of all five crystals for precession and continuous-rotation data. (c) (001) plane at a fractional height of z = 0.083 (distance from the origin 1.84 Å) through the Na2-free structure models of the crystal NATP-2. Scattering density peaks corresponding to Na2 atoms are marked by crosshairs.

IUCrJ
Volume 13| Part 3| May 2026| Pages 291-303
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526003155