Cell + Ionic relaxation with Orb v3 conservative inf MPA; 0.03 eV/Å threshold; final energy = 441.5893 eV; energy change = 13.8568 eV; symmetry: Pnma → P1
BiSeBr chalcohalide crystal structure, SbSI-type, Pnma (No. 62). Lattice: a=8.15, b=10.10, c=4.07 Å. Source: Nielsen et al., J. Mater. Chem. A, 2025 (lattice params from López et al. arxiv:2512.01531). Built from SbSI prototype ICSD coordinates.