Magnetic structure determination of multiple phases in the multiferroic candidate GdCrO₃

Using neutron powder diffraction, the successive magnetic structures in multiferroic candidate GdCrO₃ have been determined, including a complex incommensurate phase below 2.3 K. The symmetry analysis uses a combination of little group formalism and superspace group approach highlighting the strength of each method and the results are reported using the latest IUCr guidelines.

The varying temperature- and pressure-induced phase transition pathways in hybrid improper ferroelectric Sr₃Sn₂O₇

The phase transitions in Sr₃Sn₂O₇ are studied crystallographically, illustrating both the hybrid improper ferroelectric mechanism that acts in this material and the varying response of the symmetry-breaking degrees of freedom with pressure and temperature.

Cs₄Ca[Si₈O₁₉]: a new mixed tetrahedral–octahedral oxosilicate, its topological features and comparison with other interrupted framework silicates

The crystal structure of the mixed tetrahedral–octahedral framework silicate Cs₄Ca[Si₈O₁₉] has been solved. A topological analysis of the present compound and other interrupted framework silicates is presented.

Modulation of the modulated magnetic structure of an Ho i-MAX phase described by a magnetic (3+2)-dimensional superspace group. Corrigendum

Corrigendum to Acta Cryst. (2025), B81, 37–46.