Cell + Ionic relaxation with Orb v3 conservative inf MPA; 0.03 eV/Å threshold; final energy = -64.7692 eV; energy change = -112.4263 eV; symmetry: P6/mmm → P1
CeIn₂Ni₉ CaCu₅-derivative structure (P6/mmm, No. 191, 12 atoms) built from hexagonal CaCu₅ derivative. Source: Nop, Mundy, Smith & Paudyal, npj Comput. Mater. (2025).
Testing five topological misclassified compounds from Nop et al. (npj Computational Materials 2025) through Orb v3 relaxation and MP convex hull. 3/5 collapsed or degraded, revealing overlap between topology misclassification and structural failure.