Ce4Mn3Sb8 crystallizes in the tetragonal P-4m2 space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 10-coordinate geometry to two equivalent Mn(2), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(2) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Mn(1), two equivalent Mn(3), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(1) atoms to form distorted CeMn4Sb8 cuboctahedra that share corners with four equivalent Ce(2)Mn4Sb8 cuboctahedra, corners with four equivalent Mn(1)Ce4Sb4 tetrahedra, corners with four equivalent Mn(3)Ce4Sb4 tetrahedra, edges with four equivalent Ce(2)Mn4Sb8 cuboctahedra, edges with two equivalent Mn(1)Ce4Sb4 tetrahedra, edges with two equivalent Mn(3)Ce4Sb4 tetrahedra, and faces with four equivalent Ce(2)Mn4Sb8 cuboctahedra. In the third Ce site, Ce(2) is bonded to two equivalent Mn(1), two equivalent Mn(3), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(1) atoms to form distorted CeMn4Sb8 cuboctahedra that share corners with four equivalent Ce(2)Mn4Sb8 cuboctahedra, corners with four equivalent Mn(1)Ce4Sb4 tetrahedra, corners with four equivalent Mn(3)Ce4Sb4 tetrahedra, edges with four equivalent Ce(2)Mn4Sb8 cuboctahedra, edges with two equivalent Mn(1)Ce4Sb4 tetrahedra, edges with two equivalent Mn(3)Ce4Sb4 tetrahedra, and faces with four equivalent Ce(2)Mn4Sb8 cuboctahedra. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four Ce(2,2) and four equivalent Sb(1) atoms to form distorted MnCe4Sb4 tetrahedra that share corners with eight Ce(2,2)Mn4Sb8 cuboctahedra; edges with four Ce(2,2)Mn4Sb8 cuboctahedra; edges with four equivalent Mn(1)Ce4Sb4 tetrahedra; and faces with four equivalent Mn(3)Ce4Sb4 tetrahedra. In the second Mn site, Mn(2) is bonded to four equivalent Ce(1) and four equivalent Sb(2) atoms to form distorted edge-sharing MnCe4Sb4 tetrahedra. In the third Mn site, Mn(3) is bonded to four Ce(2,2) and four equivalent Sb(1) atoms to form distorted MnCe4Sb4 tetrahedra that share corners with eight Ce(2,2)Mn4Sb8 cuboctahedra; edges with four Ce(2,2)Mn4Sb8 cuboctahedra; edges with four equivalent Mn(3)Ce4Sb4 tetrahedra; and faces with four equivalent Mn(1)Ce4Sb4 tetrahedra. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to four equivalent Ce(2), two equivalent Mn(1), and two equivalent Mn(3) atoms. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to four equivalent Ce(1) and two equivalent Mn(2) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sb(4) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sb(3) atoms.
Ce4Mn3Sb8 crystallizes in the tetragonal P-4m2 space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 10-coordinate geometry to two equivalent Mn(2), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(2) atoms. Both Ce(1)-Mn(2) bond lengths are 3.35 Å. Both Ce(1)-Sb(3) bond lengths are 3.32 Å. Both Ce(1)-Sb(4) bond lengths are 3.31 Å. All Ce(1)-Sb(2) bond lengths are 3.26 Å. In the second Ce site, Ce(2) is bonded to two equivalent Mn(1), two equivalent Mn(3), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(1) atoms to form distorted CeMn4Sb8 cuboctahedra that share corners with four equivalent Ce(2)Mn4Sb8 cuboctahedra, corners with four equivalent Mn(1)Ce4Sb4 tetrahedra, corners with four equivalent Mn(3)Ce4Sb4 tetrahedra, edges with four equivalent Ce(2)Mn4Sb8 cuboctahedra, edges with two equivalent Mn(1)Ce4Sb4 tetrahedra, edges with two equivalent Mn(3)Ce4Sb4 tetrahedra, and faces with four equivalent Ce(2)Mn4Sb8 cuboctahedra. Both Ce(2)-Mn(1) bond lengths are 3.42 Å. Both Ce(2)-Mn(3) bond lengths are 3.42 Å. Both Ce(2)-Sb(3) bond lengths are 3.31 Å. Both Ce(2)-Sb(4) bond lengths are 3.32 Å. All Ce(2)-Sb(1) bond lengths are 3.24 Å. In the third Ce site, Ce(2) is bonded to two equivalent Mn(1), two equivalent Mn(3), two equivalent Sb(3), two equivalent Sb(4), and four equivalent Sb(1) atoms to form distorted CeMn4Sb8 cuboctahedra that share corners with four equivalent Ce(2)Mn4Sb8 cuboctahedra, corners with four equivalent Mn(1)Ce4Sb4 tetrahedra, corners with four equivalent Mn(3)Ce4Sb4 tetrahedra, edges with four equivalent Ce(2)Mn4Sb8 cuboctahedra, edges with two equivalent Mn(1)Ce4Sb4 tetrahedra, edges with two equivalent Mn(3)Ce4Sb4 tetrahedra, and faces with four equivalent Ce(2)Mn4Sb8 cuboctahedra. Both Ce(2)-Mn(1) bond lengths are 3.42 Å. Both Ce(2)-Mn(3) bond lengths are 3.42 Å. Both Ce(2)-Sb(3) bond lengths are 3.31 Å. Both Ce(2)-Sb(4) bond lengths are 3.32 Å. All Ce(2)-Sb(1) bond lengths are 3.24 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four Ce(2,2) and four equivalent Sb(1) atoms to form distorted MnCe4Sb4 tetrahedra that share corners with eight Ce(2,2)Mn4Sb8 cuboctahedra; edges with four Ce(2,2)Mn4Sb8 cuboctahedra; edges with four equivalent Mn(1)Ce4Sb4 tetrahedra; and faces with four equivalent Mn(3)Ce4Sb4 tetrahedra. All Mn(1)-Sb(1) bond lengths are 2.75 Å. In the second Mn site, Mn(2) is bonded to four equivalent Ce(1) and four equivalent Sb(2) atoms to form distorted edge-sharing MnCe4Sb4 tetrahedra. All Mn(2)-Sb(2) bond lengths are 2.66 Å. In the third Mn site, Mn(3) is bonded to four Ce(2,2) and four equivalent Sb(1) atoms to form distorted MnCe4Sb4 tetrahedra that share corners with eight Ce(2,2)Mn4Sb8 cuboctahedra; edges with four Ce(2,2)Mn4Sb8 cuboctahedra; edges with four equivalent Mn(3)Ce4Sb4 tetrahedra; and faces with four equivalent Mn(1)Ce4Sb4 tetrahedra. All Mn(3)-Sb(1) bond lengths are 2.75 Å. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to four equivalent Ce(2), two equivalent Mn(1), and two equivalent Mn(3) atoms. In the second Sb site, Sb(2) is bonded in a 6-coordinate geometry to four equivalent Ce(1) and two equivalent Mn(2) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sb(4) atoms. All Sb(3)-Sb(4) bond lengths are 3.10 Å. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), and four equivalent Sb(3) atoms.