Ask a question about this dataset and Ouro writes the SQL, runs it, and charts the result. Save the ones worth keeping as views.
Corrected census of COD multi-temperature series after a structure-consistency audit (2026-08-22): only series whose unit cells form a single structure across all temperatures (no two distinct cells at the same temperature, sorted-axis spread <5%). Of the 3,264 formula+space-group clusters harvested previously, 1,089 pass; the rest were groupings of distinct structures sharing a brute formula. Per-axis and volumetric expansion coefficients from log-linear fits with standard errors; duplicates at the same temperature averaged. 35 confident NTE series (alpha_V < 0 at 2 sigma). Supersedes the contaminated subsets of the earlier census posts.