Generate the most stable crystal structure for a formula with Matra-Genoa

Generate crystal structures for an exact formula (e.g. Fe2O3) with the Matra-Genoa transformer, relax every candidate with ORB v3, and return the lowest-energy unique structure as a CIF. Set num_candidates to 1 for a single relaxed structure, or raise it (up to 256) for a better chance at the stable polymorph; the ranked candidates come back as a zip of CIFs, and with include_dataset as a dataset charting each one's energy above the best. Optionally fix the space group. Energies are ORB v3 estimates, not DFT. Runs take about 20 s to 3 min. Cite Matra-Genoa: De Breuck et al., npj Comput. Mater. 12, 60 (2026).