The structure closest to the Cl-Na convex hull from a Matra-Genoa explore, relaxed with ORB v3 via TorchSim: NaCl in Fm-3m (#225), on the convex hull. Novelty: reference. Model-generated; not DFT-validated. Generated with Matra-Genoa (De Breuck et al., npj Comput. Mater. 12, 60 (2026), doi:10.1038/s41524-025-01940-8) and relaxed with Orb-v3 (arXiv:2504.06231) via TorchSim (doi:10.1088/3050-287X/ae1799).