Lu7Sb3 crystallizes in the monoclinic C2/c space group. There are seven inequivalent Lu sites. In the first Lu site, Lu(1,5) is bonded in a 4-coordinate geometry to one Lu(8), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. In the second Lu site, Lu(2) is bonded in a square co-planar geometry to one Sb(3), one Sb(4), and two equivalent Sb(1) atoms. In the third Lu site, Lu(3) is bonded in a 3-coordinate geometry to two equivalent Lu(8), one Sb(2), one Sb(3), and one Sb(4) atom. In the fourth Lu site, Lu(4) is bonded to one Sb(2), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing LuSb5 trigonal bipyramids. In the fifth Lu site, Lu(6) is bonded in a 3-coordinate geometry to two equivalent Lu(8), one Sb(2), and two equivalent Sb(1) atoms. In the sixth Lu site, Lu(7) is bonded to one Sb(2), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing LuSb5 trigonal bipyramids. In the seventh Lu site, Lu(8) is bonded in a 12-coordinate geometry to four equivalent Lu(1,5); four equivalent Lu(3); and four equivalent Lu(6) atoms. There are four inequivalent Sb sites. In the first Sb site, Sb(2) is bonded in a 8-coordinate geometry to one Lu(3); one Lu(4); one Lu(6); one Lu(7); and four equivalent Lu(1,5) atoms. In the second Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(4); two equivalent Lu(6); and two equivalent Lu(7) atoms. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(3); two equivalent Lu(4); and two equivalent Lu(7) atoms. In the fourth Sb site, Sb(4) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(3); two equivalent Lu(4); and two equivalent Lu(7) atoms.
Lu7Sb3 crystallizes in the monoclinic C2/c space group. There are seven inequivalent Lu sites. In the first Lu site, Lu(1,5) is bonded in a 4-coordinate geometry to one Lu(8), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. The Lu(1,5)-Lu(8) bond length is 3.68 Å. The Lu(1,5)-Sb(1) bond length is 3.41 Å. The Lu(1,5)-Sb(3) bond length is 3.41 Å. There is one shorter (2.96 Å) and one longer (3.08 Å) Lu(1,5)-Sb(2) bond length. In the second Lu site, Lu(2) is bonded in a square co-planar geometry to one Sb(3), one Sb(4), and two equivalent Sb(1) atoms. The Lu(2)-Sb(3) bond length is 3.09 Å. The Lu(2)-Sb(4) bond length is 3.09 Å. Both Lu(2)-Sb(1) bond lengths are 3.09 Å. In the third Lu site, Lu(3) is bonded in a 3-coordinate geometry to two equivalent Lu(8), one Sb(2), one Sb(3), and one Sb(4) atom. Both Lu(3)-Lu(8) bond lengths are 3.39 Å. The Lu(3)-Sb(2) bond length is 3.30 Å. The Lu(3)-Sb(3) bond length is 3.11 Å. The Lu(3)-Sb(4) bond length is 3.11 Å. In the fourth Lu site, Lu(4) is bonded to one Sb(2), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing LuSb5 trigonal bipyramids. The Lu(4)-Sb(2) bond length is 2.96 Å. The Lu(4)-Sb(3) bond length is 3.19 Å. The Lu(4)-Sb(4) bond length is 3.19 Å. Both Lu(4)-Sb(1) bond lengths are 3.08 Å. In the fifth Lu site, Lu(6) is bonded in a 3-coordinate geometry to two equivalent Lu(8), one Sb(2), and two equivalent Sb(1) atoms. There is one shorter (3.39 Å) and one longer (3.40 Å) Lu(6)-Lu(8) bond length. The Lu(6)-Sb(2) bond length is 3.30 Å. There is one shorter (3.10 Å) and one longer (3.11 Å) Lu(6)-Sb(1) bond length. In the sixth Lu site, Lu(7) is bonded to one Sb(2), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing LuSb5 trigonal bipyramids. The Lu(7)-Sb(2) bond length is 2.97 Å. The Lu(7)-Sb(3) bond length is 3.08 Å. The Lu(7)-Sb(4) bond length is 3.08 Å. Both Lu(7)-Sb(1) bond lengths are 3.19 Å. In the seventh Lu site, Lu(8) is bonded in a 12-coordinate geometry to four equivalent Lu(1,5); four equivalent Lu(3); and four equivalent Lu(6) atoms. There are four inequivalent Sb sites. In the first Sb site, Sb(2) is bonded in a 8-coordinate geometry to one Lu(3); one Lu(4); one Lu(6); one Lu(7); and four equivalent Lu(1,5) atoms. In the second Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(4); two equivalent Lu(6); and two equivalent Lu(7) atoms. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(3); two equivalent Lu(4); and two equivalent Lu(7) atoms. In the fourth Sb site, Sb(4) is bonded in a 9-coordinate geometry to one Lu(2); two equivalent Lu(1,5); two equivalent Lu(3); two equivalent Lu(4); and two equivalent Lu(7) atoms. Both Sb(4)-Lu(1,5) bond lengths are 3.41 Å.