The material described by Dy4CdSe7 crystallizes in the monoclinic Cm space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to one Se(4), two equivalent Se(2), two equivalent Se(3), and two equivalent Se(5) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one Se(3), two equivalent Se(1), two equivalent Se(4), and two equivalent Se(6) atoms. In the third Dy site, Dy(3) is bonded to one Se(5), one Se(6), two equivalent Se(3), and two equivalent Se(4) atoms to form DySe6 octahedra that share  a cornercorner with one Dy(4)Se6 octahedra,  a cornercorner with one Cd(1)Se6 octahedra, and edges with two equivalent Dy(3)Se6 octahedra. The corner-sharing octahedral tilt angles range from 54-55°. In the fourth Dy site, Dy(4) is bonded to one Se(2), one Se(6), two equivalent Se(1), and two equivalent Se(7) atoms to form DySe6 octahedra that share  a cornercorner with one Dy(3)Se6 octahedra, corners with two equivalent Cd(1)Se6 octahedra, edges with two equivalent Dy(4)Se6 octahedra, and edges with three equivalent Cd(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 2-54°. Cd(1) is bonded to one Se(1), one Se(5), two equivalent Se(2), and two equivalent Se(7) atoms to form CdSe6 octahedra that share  a cornercorner with one Dy(3)Se6 octahedra, corners with two equivalent Dy(4)Se6 octahedra, edges with two equivalent Cd(1)Se6 octahedra, and edges with three equivalent Dy(4)Se6 octahedra. The corner-sharing octahedral tilt angles range from 2-55°. There are seven inequivalent Se sites. In the first Se site, Se(1) is bonded to two equivalent Dy(2), two equivalent Dy(4), and one Cd(1) atom to form SeDy4Cd trigonal bipyramids that share  a cornercorner with one Se(5)Dy3Cd tetrahedra, corners with four equivalent Se(6)Dy4 tetrahedra, corners with two equivalent Se(3)Dy5 trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(6)Dy4 tetrahedra,  an edgeedge with one Se(4)Dy5 trigonal bipyramid, edges with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, and edges with two equivalent Se(1)Dy4Cd trigonal bipyramids. In the second Se site, Se(2) is bonded to one Dy(4), two equivalent Dy(1), and two equivalent Cd(1) atoms to form SeDy3Cd2 trigonal bipyramids that share  a cornercorner with one Se(6)Dy4 tetrahedra, corners with four equivalent Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(3)Dy5 trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(5)Dy3Cd tetrahedra,  an edgeedge with one Se(3)Dy5 trigonal bipyramid, edges with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, and edges with two equivalent Se(1)Dy4Cd trigonal bipyramids. In the third Se site, Se(3) is bonded to one Dy(2), two equivalent Dy(1), and two equivalent Dy(3) atoms to form distorted SeDy5 trigonal bipyramids that share corners with four equivalent Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with two equivalent Se(1)Dy4Cd trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(5)Dy3Cd tetrahedra, edges with two equivalent Se(6)Dy4 tetrahedra,  an edgeedge with one Se(2)Dy3Cd2 trigonal bipyramid, edges with two equivalent Se(3)Dy5 trigonal bipyramids, and edges with three equivalent Se(4)Dy5 trigonal bipyramids. In the fourth Se site, Se(4) is bonded to one Dy(1), two equivalent Dy(2), and two equivalent Dy(3) atoms to form distorted SeDy5 trigonal bipyramids that share corners with four equivalent Se(6)Dy4 tetrahedra, corners with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with two equivalent Se(1)Dy4Cd trigonal bipyramids, corners with two equivalent Se(3)Dy5 trigonal bipyramids,  an edgeedge with one Se(6)Dy4 tetrahedra, edges with two equivalent Se(5)Dy3Cd tetrahedra,  an edgeedge with one Se(1)Dy4Cd trigonal bipyramid, edges with two equivalent Se(4)Dy5 trigonal bipyramids, and edges with three equivalent Se(3)Dy5 trigonal bipyramids. In the fifth Se site, Se(5) is bonded to one Dy(3), two equivalent Dy(1), and one Cd(1) atom to form SeDy3Cd tetrahedra that share  a cornercorner with one Se(6)Dy4 tetrahedra, corners with two equivalent Se(5)Dy3Cd tetrahedra,  a cornercorner with one Se(1)Dy4Cd trigonal bipyramid, corners with four equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with four equivalent Se(3)Dy5 trigonal bipyramids,  an edgeedge with one Se(2)Dy3Cd2 trigonal bipyramid,  an edgeedge with one Se(3)Dy5 trigonal bipyramid, and edges with two equivalent Se(4)Dy5 trigonal bipyramids. In the sixth Se site, Se(6) is bonded to one Dy(3), one Dy(4), and two equivalent Dy(2) atoms to form SeDy4 tetrahedra that share  a cornercorner with one Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(6)Dy4 tetrahedra,  a cornercorner with one Se(2)Dy3Cd2 trigonal bipyramid, corners with four equivalent Se(1)Dy4Cd trigonal bipyramids, corners with four equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(1)Dy4Cd trigonal bipyramid,  an edgeedge with one Se(4)Dy5 trigonal bipyramid, and edges with two equivalent Se(3)Dy5 trigonal bipyramids. In the seventh Se site, Se(7) is bonded in a square co-planar geometry to two equivalent Dy(4) and two equivalent Cd(1) atoms. is represented by the CIF file [CIF]
data_Dy4CdSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.952
_cell_length_b   6.952
_cell_length_c   12.165
_cell_angle_alpha   75.668
_cell_angle_beta   75.668
_cell_angle_gamma   33.445
_symmetry_Int_Tables_number   1
_cell_volume   312.971
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Dy  Dy0  1  0.694  0.694  0.199  1.0
  Dy  Dy1  1  0.307  0.307  0.804  1.0
  Dy  Dy2  1  0.000  0.000  0.002  1.0
  Dy  Dy3  1  0.115  0.115  0.571  1.0
  Cd  Cd4  1  0.884  0.884  0.422  1.0
  Se  Se5  1  0.742  0.742  0.647  1.0
  Se  Se6  1  0.259  0.259  0.351  1.0
  Se  Se7  1  0.339  0.339  0.049  1.0
  Se  Se8  1  0.661  0.661  0.949  1.0
  Se  Se9  1  0.038  0.038  0.218  1.0
  Se  Se10  1  0.962  0.962  0.785  1.0
  Se  Se11  1  0.500  0.500  0.502  1.0
[/CIF]
.
The material described by Dy4CdSe7 crystallizes in the monoclinic Cm space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to one Se(4), two equivalent Se(2), two equivalent Se(3), and two equivalent Se(5) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one Se(3), two equivalent Se(1), two equivalent Se(4), and two equivalent Se(6) atoms. In the third Dy site, Dy(3) is bonded to one Se(5), one Se(6), two equivalent Se(3), and two equivalent Se(4) atoms to form DySe6 octahedra that share  a cornercorner with one Dy(4)Se6 octahedra,  a cornercorner with one Cd(1)Se6 octahedra, and edges with two equivalent Dy(3)Se6 octahedra. The corner-sharing octahedral tilt angles range from 54-55°. In the fourth Dy site, Dy(4) is bonded to one Se(2), one Se(6), two equivalent Se(1), and two equivalent Se(7) atoms to form DySe6 octahedra that share  a cornercorner with one Dy(3)Se6 octahedra, corners with two equivalent Cd(1)Se6 octahedra, edges with two equivalent Dy(4)Se6 octahedra, and edges with three equivalent Cd(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 2-54°. Cd(1) is bonded to one Se(1), one Se(5), two equivalent Se(2), and two equivalent Se(7) atoms to form CdSe6 octahedra that share  a cornercorner with one Dy(3)Se6 octahedra, corners with two equivalent Dy(4)Se6 octahedra, edges with two equivalent Cd(1)Se6 octahedra, and edges with three equivalent Dy(4)Se6 octahedra. The corner-sharing octahedral tilt angles range from 2-55°. There are seven inequivalent Se sites. In the first Se site, Se(1) is bonded to two equivalent Dy(2), two equivalent Dy(4), and one Cd(1) atom to form SeDy4Cd trigonal bipyramids that share  a cornercorner with one Se(5)Dy3Cd tetrahedra, corners with four equivalent Se(6)Dy4 tetrahedra, corners with two equivalent Se(3)Dy5 trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(6)Dy4 tetrahedra,  an edgeedge with one Se(4)Dy5 trigonal bipyramid, edges with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, and edges with two equivalent Se(1)Dy4Cd trigonal bipyramids. In the second Se site, Se(2) is bonded to one Dy(4), two equivalent Dy(1), and two equivalent Cd(1) atoms to form SeDy3Cd2 trigonal bipyramids that share  a cornercorner with one Se(6)Dy4 tetrahedra, corners with four equivalent Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(3)Dy5 trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(5)Dy3Cd tetrahedra,  an edgeedge with one Se(3)Dy5 trigonal bipyramid, edges with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, and edges with two equivalent Se(1)Dy4Cd trigonal bipyramids. In the third Se site, Se(3) is bonded to one Dy(2), two equivalent Dy(1), and two equivalent Dy(3) atoms to form distorted SeDy5 trigonal bipyramids that share corners with four equivalent Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with two equivalent Se(1)Dy4Cd trigonal bipyramids, corners with two equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(5)Dy3Cd tetrahedra, edges with two equivalent Se(6)Dy4 tetrahedra,  an edgeedge with one Se(2)Dy3Cd2 trigonal bipyramid, edges with two equivalent Se(3)Dy5 trigonal bipyramids, and edges with three equivalent Se(4)Dy5 trigonal bipyramids. In the fourth Se site, Se(4) is bonded to one Dy(1), two equivalent Dy(2), and two equivalent Dy(3) atoms to form distorted SeDy5 trigonal bipyramids that share corners with four equivalent Se(6)Dy4 tetrahedra, corners with two equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with two equivalent Se(1)Dy4Cd trigonal bipyramids, corners with two equivalent Se(3)Dy5 trigonal bipyramids,  an edgeedge with one Se(6)Dy4 tetrahedra, edges with two equivalent Se(5)Dy3Cd tetrahedra,  an edgeedge with one Se(1)Dy4Cd trigonal bipyramid, edges with two equivalent Se(4)Dy5 trigonal bipyramids, and edges with three equivalent Se(3)Dy5 trigonal bipyramids. In the fifth Se site, Se(5) is bonded to one Dy(3), two equivalent Dy(1), and one Cd(1) atom to form SeDy3Cd tetrahedra that share  a cornercorner with one Se(6)Dy4 tetrahedra, corners with two equivalent Se(5)Dy3Cd tetrahedra,  a cornercorner with one Se(1)Dy4Cd trigonal bipyramid, corners with four equivalent Se(2)Dy3Cd2 trigonal bipyramids, corners with four equivalent Se(3)Dy5 trigonal bipyramids,  an edgeedge with one Se(2)Dy3Cd2 trigonal bipyramid,  an edgeedge with one Se(3)Dy5 trigonal bipyramid, and edges with two equivalent Se(4)Dy5 trigonal bipyramids. In the sixth Se site, Se(6) is bonded to one Dy(3), one Dy(4), and two equivalent Dy(2) atoms to form SeDy4 tetrahedra that share  a cornercorner with one Se(5)Dy3Cd tetrahedra, corners with two equivalent Se(6)Dy4 tetrahedra,  a cornercorner with one Se(2)Dy3Cd2 trigonal bipyramid, corners with four equivalent Se(1)Dy4Cd trigonal bipyramids, corners with four equivalent Se(4)Dy5 trigonal bipyramids,  an edgeedge with one Se(1)Dy4Cd trigonal bipyramid,  an edgeedge with one Se(4)Dy5 trigonal bipyramid, and edges with two equivalent Se(3)Dy5 trigonal bipyramids. In the seventh Se site, Se(7) is bonded in a square co-planar geometry to two equivalent Dy(4) and two equivalent Cd(1) atoms. is represented by the CIF file [CIF]
data_Dy4CdSe7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.952
_cell_length_b   6.952
_cell_length_c   12.165
_cell_angle_alpha   75.668
_cell_angle_beta   75.668
_cell_angle_gamma   33.445
_symmetry_Int_Tables_number   1
_cell_volume   312.971
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Dy  Dy0  1  0.694  0.694  0.199  1.0
  Dy  Dy1  1  0.307  0.307  0.804  1.0
  Dy  Dy2  1  0.000  0.000  0.002  1.0
  Dy  Dy3  1  0.115  0.115  0.571  1.0
  Cd  Cd4  1  0.884  0.884  0.422  1.0
  Se  Se5  1  0.742  0.742  0.647  1.0
  Se  Se6  1  0.259  0.259  0.351  1.0
  Se  Se7  1  0.339  0.339  0.049  1.0
  Se  Se8  1  0.661  0.661  0.949  1.0
  Se  Se9  1  0.038  0.038  0.218  1.0
  Se  Se10  1  0.962  0.962  0.785  1.0
  Se  Se11  1  0.500  0.500  0.502  1.0
[/CIF]
.