Guidelines for communicating commensurate magnetic structures. A report of the International Union of Crystallography Commission on Magnetic Structures

Guidelines for the publication of magnetic structures are reported by the IUCr Commission on Magnetic Structures.

Following the guidelines for communicating commensurate magnetic structures: real case examples

Different examples are described on how to follow the recently published guidelines [Perez-Mato et al. (2024). Acta Cryst. B80, 219–234] when reporting a commensurate magnetic structure.

Current developments and trends in quantum crystallography

Recent methodological developments and their applications in quantum crystallography are reviewed, with an eye towards near-future advancements in this research field.

Multiscale structure of LaAlO₃ from single-crystal X-ray diffraction

Multiscale structure, including macroscopic domain ratios, and the atomic scale structure of LaAlO₃ perovskite oxide have been determined using synchrotron radiation single-crystal X-ray diffraction.

Magnetic structures in R₅Pt₂In₄ (R = Tb–Tm) investigated by neutron powder diffraction

Magnetic structures in R₅Pt₂In₄ (R = Tb–Tm) are determined from neutron powder diffraction.

Supramolecular architectures in multicomponent crystals of imidazole-based drugs and tri­thio­cyanuric acid

The structures of three distinct forms (cocrystal, salt and a hybrid cocrystal of salt) of multicomponent crystals of imidazole-based drugs (metronidazole, ketoconazole and miconazole) with tri­thio­cyanuric acid as coformer are characterized. Their supramolecular architectures reflect the interplay between different molecular species.

Ring formation of transition metal trichalcogenide TaSe₃ using vapor liquid process

Demonstrated here is the successful growth of continuous, edgeless ring-shaped crystals of TaSe₃ from the liquid phase.

A comparative study of the effect of high-pressure and low temperature on the crystal structure of lithium xanthinate hydrate

Anisotropic structural changes in crystalline lithium xanthinate hydrate on cooling to 100 K and under compression to 5.3 GPa are compared. A phase transition at ∼4 GPa was observed.

New ion radii for oxides and oxysalts, fluorides, chlorides and nitrides

Ion radii are derived from observed mean bond lengths (characteristic bond lengths) for 135 ions bonded to oxygen, fluorine, hydroxyl, chlorine and nitro­gen. Radii derived from quantum-mechanical calculations do not agree with radii derived from experimentally determined bond lengths. However, this problem is removed by recognition that ion radii determined from characteristic bond lengths are not a measure of the sizes of ions but proxy variables for characteristic bond lengths.

Orientational and crystallographic relationships in thin films of yttrium orthoferrite on sapphire substrates

An algorithm is proposed for determining the orientational relationships and crystal unit-cell parameters of thin films using a laboratory X-ray diffractometer and stereographic projections. It is illustrated by the treatment of experimental data obtained for yttrium orthoferrite YFeO₃ films on single crystalline sapphire (Al₂O₃) substrates.

Solvatomorphism in a series of copper(II) complexes with the 5-phenyl­imidazole/perchlorate system as ligands

The reactions of Cu(ClO₄)₂·6H₂O and L′H in a variety of solvents have provided access to 12 solvatomorphs of the general formula [Cu(ClO₄)₂(LH)₄]·x(solvent); the effect of the solvents on the packing of the complexes is critically discussed.

Synthesis and structural characterization of a new dinuclear platinum(III) complex, [Pt₂Cl₄(NH₃)₂{μ-HN=C(O)Bu^t}₂], and Synthesis and structure of two novel trans-platinum complexes. Addenda and errata

Articles by Vinci & Chateigner [(2022). Acta Cryst. B78, 835–841; (2023). Acta Cryst. B79, 213–219] are corrected.