Pu4Sb3 crystallizes in the tetragonal I-42d space group. Pu(1) is bonded to two equivalent Sb(2) and four equivalent Sb(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSb6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to eight equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SbPu8 hexagonal bipyramids. In the second Sb site, Sb(2) is bonded to eight equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SbPu8 hexagonal bipyramids.
Pu4Sb3 crystallizes in the tetragonal I-42d space group. Pu(1) is bonded to two equivalent Sb(2) and four equivalent Sb(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSb6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. There is one shorter (3.16 Å) and one longer (3.28 Å) Pu(1)-Sb(2) bond length. There are a spread of Pu(1)-Sb(1) bond distances ranging from 3.16-3.30 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to eight equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SbPu8 hexagonal bipyramids. In the second Sb site, Sb(2) is bonded to eight equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SbPu8 hexagonal bipyramids.