Gate 1 screening results for Nowotny chimney-ladder Mn5Ge3 (P63/mcm). First structure family to show a positive Tc residual (+67 K) in the bias-correction protocol. Moment PASS, e_hull false-flag (same pattern as L10, Cu2Sb, FeB, D022).
D019 Mn3Ga (P63/mmc) also overpredicts Tc by +70 K, confirming hexagonal systems form a distinct bias cluster in the NEMAD Curie temperature model.
Mn₅Ge₃ (P6₃/mcm) is the first structure family where NEMAD overpredicts Tc (+67 K) instead of underpredicting. Implications for structure-dependent bias correction.