H14 (Mn-Al binary) candidate: Mn5Al P4/mmm #123, 6 atoms, e_above_hull 0.0732 eV/atom, GGen exploration action 01a09aa9-9704-7d9d-8fbc-edaf80276a43, structure bb6bbfbb. Validated 2026-09-13: parses, ordered, min dist 2.372 A, SG 123, rho 7.20 g/cm3.