Orb-relaxed Fe18 Co1 Si8 B4 boride candidate. CIF SHA256 f914ae3a7a0c797bb8d095007b3d272375f25fe20eeae38461428de73eb08dc3. Unconstrained variable-cell ML relaxation; no DFT. Ouro same-formula novelty, hull stability and magnetic performance remain under review; cross-composition framework novelty is separate. Derived from published source: https://www.crystallography.net/cod/1511073.html. Known scaffold reference https://www.crystallography.net/cod/1511073.html; authored-parent input SHA256 . Terms: See CIF attribution. Published parent framework; the authored mutation is not an experimentally established material.