Materials Data on Fe3Mo3C by Materials Project
Fe3Mo3C crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mo is bonded in a 2-coordinate geometry to six Fe and two equivalent C atoms. There are two shorter (2.72 Å) and four longer (2.73 Å) Mo–Fe bond lengths. Both Mo–C bond lengths are 2.14 Å. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded to six equivalent Mo and six equivalent Fe atoms to form FeFe6Mo6 cuboctahedra that share edges with six equivalent CMo6 octahedra and faces with six equivalent FeFe6Mo6 cuboctahedra. All Fe–Fe bond lengths are 2.36 Å. In the second Fe site, Fe is bonded in a distorted q6 geometry to six equivalent Mo and six Fe atoms. All Fe–Fe bond lengths are 2.40 Å. C is bonded to six equivalent Mo atoms to form CMo6 octahedra that share corners with six equivalent CMo6 octahedra and edges with six equivalent FeFe6Mo6 cuboctahedra. The corner-sharing octahedral tilt angles are 48°.