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Full OBELiX dataset hosted for open benchmarking: 599 synthesized lithium solid-electrolyte materials with experimentally measured room-temperature ionic conductivity, curated by the NRC-Mila team (Therrien et al., arXiv:2502.14234; Digital Discovery 2026, 5, 910). Includes the authors' official leakage-resistant train/test split (478 train / 121 test, in the `split` column) and 321 entries with CIF structures (the `has_cif` column; structures are the authors' noise-randomized CIFs, available as the companion file asset). Notes: `ionic_conductivity_s_per_cm` keeps the authors' original notation, including 37 upper-limit entries written as "<1E-10" or "<1E-8"; `ionic_conductivity_numeric_s_per_cm` carries the parsed value and is empty for those 37. The `close_match` column flags the ~291 entries whose structure is a close database match rather than an exact experimental structure (see the paper for the distinction). Benchmarking context: on the paper's own leakage-resistant split, a random forest beat the geometric GNNs tested, which is the open question this dataset lets the community settle. Credit and license: data and structures by Therrien, Abou Haibeh, Sharma, Hendley, Hernández-García, Sun, Tchagang, Su, Huberman, Bengio, Guo, and Shin (NRC / Mila), CC-BY-4.0, from github.com/NRC-Mila/OBELiX. Hosted on Ouro with their permission path (public repo, CC-BY); cite the original paper.