Fe12B4 Pnma, recovered Fe3B ground state (ORB -8.2330 eV/atom)

Best of 200 random PyXtal + ORB trials for Fe12B4 (16 atoms). Matches the Materials Project Fe3B Pnma phase (ORB -8.2327 eV/atom). Reached by only 3% of trials, from proposed space groups 19 and 200.