Creative Commons Attribution 4.0 International License (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ You are free to share and adapt the material for any purpose, including commercially, under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Attribution template: STEM2Crystal-Bench (2026). From Noisy STEM to Crystal Structure: Evidence-Structure CoDiffusion under Composition Constraints. CC BY 4.0. For the real_stem_eval5/ subset, additionally cite the original source papers listed in README.md.