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Obituary

Brian H. O'Connor (1940–2024)

Husin Sitepu

$Figure 1. Experimental geometry and fundamental principles of XCCA (after Möller et al., 2025). A single-shot diffraction pattern captures a 2D slice of the 3D intensity distribution in reciprocal space, determined by the geometry of the Ewald sphere. In XCCA, azimuthal intensity correlations of the 2D pattern are analyzed to access the 3D reciprocal space.$

Commentary

Femtosecond X-rays illuminate disordered states during the early stages of crystallization

Akinobu Niozu

Commentary

Phase seeding may provide a gateway to structure solution by deep learning

Anders Østergaard Madsen

Figure 1. An ORTEP representation of an arbitrary atom with different ratios of lowest and highest principal-axis displacement parameters, i.e. reflecting the amount of asphericity, with most isotropic on the left (in blue) and most anisotropic on the right (in red). Adapted from Deringer et al., 2014, with permission from The Royal Society of Chemistry.

Commentary

Everything you always wanted to know about the Debye–Waller factor but were afraid to ask

Richard Dronskowski

This article is part of a focused issue on Quantum Crystallography.

Editorial

Electron diffraction in structural chemistry

Glenn P. A. Yap

New products

Suppressing fluorescence in XRD: Striking the balance between speed and data quality

In the world of X-ray diffraction (XRD), precision is everything. From identifying crystal structures in complex minerals to quality control in advanced steel production, the reliability of XRD data directly impacts decisions across scientific and industrial sectors.