Negative control CIF, magnet program. NiO rock salt (Fm-3m #225), a=4.177 A. Validated 2026-09-04: parses in pymatgen; reduced formula NiO; 8 sites (Ni4O4); SG #225 at symprec 0.01 and 0.1; density 6.81 g/cm3 (experimental 6.67); min pair distance 2.088 A; ordered occupancies. Expected: antiferromagnet (T_N = 525 K), saturation magnetization ~0; must FAIL the ms_tesla >= 0.10 tier-1 gate.
Control: NiO (negative) — Fm-3m · Files on Ouro
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