U3MnSb5 crystallizes in the hexagonal P6_3/mcm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Sb(1) and five equivalent Sb(2) atoms. Mn(1) is bonded to six equivalent Sb(2) atoms to form face-sharing MnSb6 octahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to six equivalent U(1) and two equivalent Sb(1) atoms. In the second Sb site, Sb(2) is bonded to five equivalent U(1) and two equivalent Mn(1) atoms to form a mixture of distorted face, corner, and edge-sharing SbU5Mn2 pentagonal bipyramids.
U3MnSb5 crystallizes in the hexagonal P6_3/mcm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Sb(1) and five equivalent Sb(2) atoms. All U(1)-Sb(1) bond lengths are 3.16 Å. There are a spread of U(1)-Sb(2) bond distances ranging from 3.08-3.32 Å. Mn(1) is bonded to six equivalent Sb(2) atoms to form face-sharing MnSb6 octahedra. All Mn(1)-Sb(2) bond lengths are 2.69 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to six equivalent U(1) and two equivalent Sb(1) atoms. Both Sb(1)-Sb(1) bond lengths are 3.05 Å. In the second Sb site, Sb(2) is bonded to five equivalent U(1) and two equivalent Mn(1) atoms to form a mixture of distorted face, corner, and edge-sharing SbU5Mn2 pentagonal bipyramids.