## Wild-sample calibration of structure sanity card v4.3
88 inorganic CIFs sampled from the Crystallography Open Database (8 stratified years 1991-2024, uniform random within year, organic entries excluded via C&H formula filter), each run through structure sanity card v4.3 with no declared prototype. This is the card's **wild base rate**: how often each gate fires on real published files rather than synthetic corruption.
Headline: 1 clean pass, 63 CHECK, 21 FAIL, 3 parser refusals. The one clean pass is SrTiO3 (COD 1512124), a 5-atom cubic perovskite — exactly the prototype class the card was tuned on.
Per-gate manual verification (2026-08-08):
- All 10 min_pair FAILs are split-site or mixed-site disorder representations (occupancy sum <= 1 on the offending pair) except COD 4500668 (partially occupied W 0.33 A from a fully occupied O), which remains genuinely questionable.
- All 15 reference_match FAILs trace to non-standard space-group settings (Pcab/Pbnm/P 21/n), triclinic P-1 cells, or large disordered cells — the matcher's setting-sensitivity, not corrupted coordinates.
- The 82-entry metadata CHECK storm is mostly declaration-convention noise (formula-unit vs cell contents, unlocated H) plus a card bug: the v4.2 dominant-species surrogate deletes minority species before the formula comparison, and SG labels are string-compared (Pbnm vs Pnma false-fires; both are #62).
- 3 parser refusals are real file problems: malformed or occupancy-inconsistent atom_site loops, including a 2024 NMC-111 cathode CIF (COD 3000558) whose O rows are missing a column field.
Columns: per-entry gate levels (PASS/NOTE < CHECK < FAIL), min-pair distance, declared vs detected space group, and a manual fail_class classification. Companion post: "The card meets the wild" in #materials-science. Card script: file 700b11cd-ee77-4a03-88e0-736b8089ff88. Synthetic-corruption counterpart: dataset 019fdeba-fcb5-7fc9-9c9e-97c27f87d6a9.
| Column | Range | Mean | Filled |
|---|---|---|---|
| cod_id | 1,001,482–9,017,741 | 4,319,329 | 99% |
| year | 1,991–2,026 | 2,008 | 100% |
| formula_declared | 175 distinct | — | 100% |
| declared_sg | 47 distinct | — | 100% |
| journal | 49 distinct | — | 100% |
| doi | 57 distinct | — | 67% |
| outcome | 2 distinct | — | 100% |
| worst_verdict | 4 distinct | — | 100% |
| gate_min_pair | 4 distinct | — | 98% |
| gate_metadata | 3 distinct | — | 98% |
| gate_stoichiometry | 4 distinct | — | 98% |
| gate_symmetry | 4 distinct | — | 98% |
| gate_occupancy | 3 distinct | — | 98% |
| gate_bond_dispersion | 1 distinct | — | 98% |
| gate_reference_match | 3 distinct | — | 98% |
| min_pair_distance_a | 0.1499–2.763 | 1.623 | 97% |
| n_sites | 4–2,400 | 104.9 | 97% |
| parsed_formula | 122 distinct | — | 97% |
| tight_sg | 41 distinct | — | 97% |
| fail_class | 5 distinct | — | 100% |
| error | 1 distinct | — | 3% |