Y4CdS7 crystallizes in the monoclinic Cm space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one S(4), two equivalent S(2), two equivalent S(3), and two equivalent S(5) atoms. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to one S(3), two equivalent S(1), two equivalent S(4), and two equivalent S(6) atoms. In the third Y site, Y(3) is bonded to one S(5), one S(6), two equivalent S(3), and two equivalent S(4) atoms to form YS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra,  a cornercorner with one Cd(1)S6 octahedra, and edges with two equivalent Y(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. In the fourth Y site, Y(4) is bonded to one S(2), one S(6), two equivalent S(1), and two equivalent S(7) atoms to form YS6 octahedra that share  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Cd(1)S6 octahedra, edges with two equivalent Y(4)S6 octahedra, and edges with three equivalent Cd(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 3-54°. Cd(1) is bonded to one S(1), one S(5), two equivalent S(2), and two equivalent S(7) atoms to form CdS6 octahedra that share  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, edges with two equivalent Cd(1)S6 octahedra, and edges with three equivalent Y(4)S6 octahedra. The corner-sharing octahedral tilt angles range from 3-56°. There are seven inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Y(2), two equivalent Y(4), and one Cd(1) atom to form SY4Cd trigonal bipyramids that share  a cornercorner with one S(5)Y3Cd tetrahedra, corners with four equivalent S(6)Y4 tetrahedra, corners with two equivalent S(3)Y5 trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(6)Y4 tetrahedra,  an edgeedge with one S(4)Y5 trigonal bipyramid, edges with two equivalent S(2)Y3Cd2 trigonal bipyramids, and edges with two equivalent S(1)Y4Cd trigonal bipyramids. In the second S site, S(2) is bonded to one Y(4), two equivalent Y(1), and two equivalent Cd(1) atoms to form SY3Cd2 trigonal bipyramids that share  a cornercorner with one S(6)Y4 tetrahedra, corners with four equivalent S(5)Y3Cd tetrahedra, corners with two equivalent S(3)Y5 trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(5)Y3Cd tetrahedra,  an edgeedge with one S(3)Y5 trigonal bipyramid, edges with two equivalent S(2)Y3Cd2 trigonal bipyramids, and edges with two equivalent S(1)Y4Cd trigonal bipyramids. In the third S site, S(3) is bonded to one Y(2), two equivalent Y(1), and two equivalent Y(3) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(5)Y3Cd tetrahedra, corners with two equivalent S(2)Y3Cd2 trigonal bipyramids, corners with two equivalent S(1)Y4Cd trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(5)Y3Cd tetrahedra, edges with two equivalent S(6)Y4 tetrahedra,  an edgeedge with one S(2)Y3Cd2 trigonal bipyramid, edges with two equivalent S(3)Y5 trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the fourth S site, S(4) is bonded to one Y(1), two equivalent Y(2), and two equivalent Y(3) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(6)Y4 tetrahedra, corners with two equivalent S(2)Y3Cd2 trigonal bipyramids, corners with two equivalent S(1)Y4Cd trigonal bipyramids, corners with two equivalent S(3)Y5 trigonal bipyramids,  an edgeedge with one S(6)Y4 tetrahedra, edges with two equivalent S(5)Y3Cd tetrahedra,  an edgeedge with one S(1)Y4Cd trigonal bipyramid, edges with two equivalent S(4)Y5 trigonal bipyramids, and edges with three equivalent S(3)Y5 trigonal bipyramids. In the fifth S site, S(5) is bonded to one Y(3), two equivalent Y(1), and one Cd(1) atom to form SY3Cd tetrahedra that share  a cornercorner with one S(6)Y4 tetrahedra, corners with two equivalent S(5)Y3Cd tetrahedra,  a cornercorner with one S(1)Y4Cd trigonal bipyramid, corners with four equivalent S(2)Y3Cd2 trigonal bipyramids, corners with four equivalent S(3)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y3Cd2 trigonal bipyramid,  an edgeedge with one S(3)Y5 trigonal bipyramid, and edges with two equivalent S(4)Y5 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Y(3), one Y(4), and two equivalent Y(2) atoms to form SY4 tetrahedra that share  a cornercorner with one S(5)Y3Cd tetrahedra, corners with two equivalent S(6)Y4 tetrahedra,  a cornercorner with one S(2)Y3Cd2 trigonal bipyramid, corners with four equivalent S(1)Y4Cd trigonal bipyramids, corners with four equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(1)Y4Cd trigonal bipyramid,  an edgeedge with one S(4)Y5 trigonal bipyramid, and edges with two equivalent S(3)Y5 trigonal bipyramids. In the seventh S site, S(7) is bonded in a rectangular see-saw-like geometry to two equivalent Y(4) and two equivalent Cd(1) atoms.
Y4CdS7 crystallizes in the monoclinic Cm space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one S(4), two equivalent S(2), two equivalent S(3), and two equivalent S(5) atoms. The Y(1)-S(4) bond length is 3.06 Å. Both Y(1)-S(2) bond lengths are 2.87 Å. Both Y(1)-S(3) bond lengths are 2.93 Å. Both Y(1)-S(5) bond lengths are 2.72 Å. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to one S(3), two equivalent S(1), two equivalent S(4), and two equivalent S(6) atoms. The Y(2)-S(3) bond length is 3.00 Å. Both Y(2)-S(1) bond lengths are 2.92 Å. Both Y(2)-S(4) bond lengths are 2.90 Å. Both Y(2)-S(6) bond lengths are 2.71 Å. In the third Y site, Y(3) is bonded to one S(5), one S(6), two equivalent S(3), and two equivalent S(4) atoms to form YS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra,  a cornercorner with one Cd(1)S6 octahedra, and edges with two equivalent Y(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. The Y(3)-S(5) bond length is 2.67 Å. The Y(3)-S(6) bond length is 2.70 Å. Both Y(3)-S(3) bond lengths are 2.75 Å. Both Y(3)-S(4) bond lengths are 2.75 Å. In the fourth Y site, Y(4) is bonded to one S(2), one S(6), two equivalent S(1), and two equivalent S(7) atoms to form YS6 octahedra that share  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Cd(1)S6 octahedra, edges with two equivalent Y(4)S6 octahedra, and edges with three equivalent Cd(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 3-54°. The Y(4)-S(2) bond length is 2.73 Å. The Y(4)-S(6) bond length is 2.74 Å. Both Y(4)-S(1) bond lengths are 2.80 Å. Both Y(4)-S(7) bond lengths are 2.67 Å. Cd(1) is bonded to one S(1), one S(5), two equivalent S(2), and two equivalent S(7) atoms to form CdS6 octahedra that share  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, edges with two equivalent Cd(1)S6 octahedra, and edges with three equivalent Y(4)S6 octahedra. The corner-sharing octahedral tilt angles range from 3-56°. The Cd(1)-S(1) bond length is 2.79 Å. The Cd(1)-S(5) bond length is 2.65 Å. Both Cd(1)-S(2) bond lengths are 2.76 Å. Both Cd(1)-S(7) bond lengths are 2.73 Å. There are seven inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Y(2), two equivalent Y(4), and one Cd(1) atom to form SY4Cd trigonal bipyramids that share  a cornercorner with one S(5)Y3Cd tetrahedra, corners with four equivalent S(6)Y4 tetrahedra, corners with two equivalent S(3)Y5 trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(6)Y4 tetrahedra,  an edgeedge with one S(4)Y5 trigonal bipyramid, edges with two equivalent S(2)Y3Cd2 trigonal bipyramids, and edges with two equivalent S(1)Y4Cd trigonal bipyramids. In the second S site, S(2) is bonded to one Y(4), two equivalent Y(1), and two equivalent Cd(1) atoms to form SY3Cd2 trigonal bipyramids that share  a cornercorner with one S(6)Y4 tetrahedra, corners with four equivalent S(5)Y3Cd tetrahedra, corners with two equivalent S(3)Y5 trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(5)Y3Cd tetrahedra,  an edgeedge with one S(3)Y5 trigonal bipyramid, edges with two equivalent S(2)Y3Cd2 trigonal bipyramids, and edges with two equivalent S(1)Y4Cd trigonal bipyramids. In the third S site, S(3) is bonded to one Y(2), two equivalent Y(1), and two equivalent Y(3) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(5)Y3Cd tetrahedra, corners with two equivalent S(2)Y3Cd2 trigonal bipyramids, corners with two equivalent S(1)Y4Cd trigonal bipyramids, corners with two equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(5)Y3Cd tetrahedra, edges with two equivalent S(6)Y4 tetrahedra,  an edgeedge with one S(2)Y3Cd2 trigonal bipyramid, edges with two equivalent S(3)Y5 trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the fourth S site, S(4) is bonded to one Y(1), two equivalent Y(2), and two equivalent Y(3) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(6)Y4 tetrahedra, corners with two equivalent S(2)Y3Cd2 trigonal bipyramids, corners with two equivalent S(1)Y4Cd trigonal bipyramids, corners with two equivalent S(3)Y5 trigonal bipyramids,  an edgeedge with one S(6)Y4 tetrahedra, edges with two equivalent S(5)Y3Cd tetrahedra,  an edgeedge with one S(1)Y4Cd trigonal bipyramid, edges with two equivalent S(4)Y5 trigonal bipyramids, and edges with three equivalent S(3)Y5 trigonal bipyramids. In the fifth S site, S(5) is bonded to one Y(3), two equivalent Y(1), and one Cd(1) atom to form SY3Cd tetrahedra that share  a cornercorner with one S(6)Y4 tetrahedra, corners with two equivalent S(5)Y3Cd tetrahedra,  a cornercorner with one S(1)Y4Cd trigonal bipyramid, corners with four equivalent S(2)Y3Cd2 trigonal bipyramids, corners with four equivalent S(3)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y3Cd2 trigonal bipyramid,  an edgeedge with one S(3)Y5 trigonal bipyramid, and edges with two equivalent S(4)Y5 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Y(3), one Y(4), and two equivalent Y(2) atoms to form SY4 tetrahedra that share  a cornercorner with one S(5)Y3Cd tetrahedra, corners with two equivalent S(6)Y4 tetrahedra,  a cornercorner with one S(2)Y3Cd2 trigonal bipyramid, corners with four equivalent S(1)Y4Cd trigonal bipyramids, corners with four equivalent S(4)Y5 trigonal bipyramids,  an edgeedge with one S(1)Y4Cd trigonal bipyramid,  an edgeedge with one S(4)Y5 trigonal bipyramid, and edges with two equivalent S(3)Y5 trigonal bipyramids. In the seventh S site, S(7) is bonded in a rectangular see-saw-like geometry to two equivalent Y(4) and two equivalent Cd(1) atoms.