In3(Co10B3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one In(2) and three equivalent B(1) atoms. In the second Co site, Co(2) is bonded in a 2-coordinate geometry to one In(1), two equivalent In(2), and two equivalent B(1) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to twelve equivalent Co(2) atoms to form face-sharing InCo12 cuboctahedra. In the second In site, In(2) is bonded to four equivalent Co(1) and twelve equivalent Co(2) atoms to form distorted InCo16 tetrahedra that share edges with six equivalent In(2)Co16 tetrahedra and faces with four equivalent In(1)Co12 cuboctahedra. B(1) is bonded in a 8-coordinate geometry to four equivalent Co(1) and four equivalent Co(2) atoms.
In3(Co10B3)2 crystallizes in the cubic Fm-3m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one In(2) and three equivalent B(1) atoms. The Co(1)-In(2) bond length is 2.53 Å. All Co(1)-B(1) bond lengths are 2.08 Å. In the second Co site, Co(2) is bonded in a 2-coordinate geometry to one In(1), two equivalent In(2), and two equivalent B(1) atoms. The Co(2)-In(1) bond length is 2.60 Å. Both Co(2)-In(2) bond lengths are 2.92 Å. Both Co(2)-B(1) bond lengths are 2.15 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded to twelve equivalent Co(2) atoms to form face-sharing InCo12 cuboctahedra. In the second In site, In(2) is bonded to four equivalent Co(1) and twelve equivalent Co(2) atoms to form distorted InCo16 tetrahedra that share edges with six equivalent In(2)Co16 tetrahedra and faces with four equivalent In(1)Co12 cuboctahedra. B(1) is bonded in a 8-coordinate geometry to four equivalent Co(1) and four equivalent Co(2) atoms.