The structure described by CeY4S7 crystallizes in the monoclinic Cm space group. Ce(1) is bonded to one S(1), one S(3), two equivalent S(4), and two equivalent S(7) atoms to form CeS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Y(3)S6 octahedra, corners with two equivalent Y(2)S7 pentagonal bipyramids, corners with four equivalent Y(1)S7 pentagonal bipyramids, edges with two equivalent Ce(1)S6 octahedra, edges with three equivalent Y(3)S6 octahedra, and  an edgeedge with one Y(1)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 2-58°. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to one S(6), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms to form distorted YS7 pentagonal bipyramids that share corners with two equivalent Y(3)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, corners with four equivalent Ce(1)S6 octahedra,  an edgeedge with one Ce(1)S6 octahedra, edges with three equivalent Y(4)S6 octahedra, edges with two equivalent Y(2)S7 pentagonal bipyramids, and faces with two equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 21-65°. In the second Y site, Y(2) is bonded to one S(5), two equivalent S(2), two equivalent S(3), and two equivalent S(6) atoms to form distorted YS7 pentagonal bipyramids that share corners with two equivalent Ce(1)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, corners with four equivalent Y(3)S6 octahedra,  an edgeedge with one Y(3)S6 octahedra, edges with three equivalent Y(4)S6 octahedra, edges with two equivalent Y(1)S7 pentagonal bipyramids, and faces with two equivalent Y(2)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. In the third Y site, Y(3) is bonded to one S(2), one S(4), two equivalent S(3), and two equivalent S(7) atoms to form YS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Ce(1)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, corners with four equivalent Y(2)S7 pentagonal bipyramids, edges with two equivalent Y(3)S6 octahedra, edges with three equivalent Ce(1)S6 octahedra, and  an edgeedge with one Y(2)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 2-58°. In the fourth Y site, Y(4) is bonded to one S(1), one S(2), two equivalent S(5), and two equivalent S(6) atoms to form YS6 octahedra that share  a cornercorner with one Ce(1)S6 octahedra,  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, corners with two equivalent Y(2)S7 pentagonal bipyramids, edges with two equivalent Y(4)S6 octahedra, edges with three equivalent Y(1)S7 pentagonal bipyramids, and edges with three equivalent Y(2)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 58°. There are seven inequivalent S sites. In the first S site, S(1) is bonded to one Ce(1), one Y(4), and two equivalent Y(1) atoms to form SCeY3 tetrahedra that share  a cornercorner with one S(2)Y4 tetrahedra, corners with two equivalent S(1)CeY3 tetrahedra,  a cornercorner with one S(3)CeY4 trigonal bipyramid, corners with four equivalent S(4)Ce2Y3 trigonal bipyramids, corners with four equivalent S(5)Y5 trigonal bipyramids,  an edgeedge with one S(4)Ce2Y3 trigonal bipyramid,  an edgeedge with one S(5)Y5 trigonal bipyramid, and edges with two equivalent S(6)Y5 trigonal bipyramids. In the second S site, S(2) is bonded to one Y(3), one Y(4), and two equivalent Y(2) atoms to form distorted SY4 tetrahedra that share  a cornercorner with one S(1)CeY3 tetrahedra, corners with two equivalent S(2)Y4 tetrahedra,  a cornercorner with one S(4)Ce2Y3 trigonal bipyramid, corners with four equivalent S(3)CeY4 trigonal bipyramids, corners with four equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(3)CeY4 trigonal bipyramid,  an edgeedge with one S(6)Y5 trigonal bipyramid, and edges with two equivalent S(5)Y5 trigonal bipyramids. In the third S site, S(3) is bonded to one Ce(1), two equivalent Y(2), and two equivalent Y(3) atoms to form SCeY4 trigonal bipyramids that share  a cornercorner with one S(1)CeY3 tetrahedra, corners with four equivalent S(2)Y4 tetrahedra, corners with two equivalent S(5)Y5 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y4 tetrahedra,  an edgeedge with one S(6)Y5 trigonal bipyramid, edges with two equivalent S(4)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(3)CeY4 trigonal bipyramids. In the fourth S site, S(4) is bonded to two equivalent Ce(1), one Y(3), and two equivalent Y(1) atoms to form SCe2Y3 trigonal bipyramids that share  a cornercorner with one S(2)Y4 tetrahedra, corners with four equivalent S(1)CeY3 tetrahedra, corners with two equivalent S(5)Y5 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(1)CeY3 tetrahedra,  an edgeedge with one S(5)Y5 trigonal bipyramid, edges with two equivalent S(4)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(3)CeY4 trigonal bipyramids. In the fifth S site, S(5) is bonded to one Y(2), two equivalent Y(1), and two equivalent Y(4) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(1)CeY3 tetrahedra, corners with two equivalent S(4)Ce2Y3 trigonal bipyramids, corners with two equivalent S(3)CeY4 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(1)CeY3 tetrahedra, edges with two equivalent S(2)Y4 tetrahedra,  an edgeedge with one S(4)Ce2Y3 trigonal bipyramid, edges with two equivalent S(5)Y5 trigonal bipyramids, and edges with three equivalent S(6)Y5 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Y(1), two equivalent Y(2), and two equivalent Y(4) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(2)Y4 tetrahedra, corners with two equivalent S(4)Ce2Y3 trigonal bipyramids, corners with two equivalent S(3)CeY4 trigonal bipyramids, corners with two equivalent S(5)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y4 tetrahedra, edges with two equivalent S(1)CeY3 tetrahedra,  an edgeedge with one S(3)CeY4 trigonal bipyramid, edges with two equivalent S(6)Y5 trigonal bipyramids, and edges with three equivalent S(5)Y5 trigonal bipyramids. In the seventh S site, S(7) is bonded in a square co-planar geometry to two equivalent Ce(1) and two equivalent Y(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeY4S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.805
_cell_length_b   6.805
_cell_length_c   11.701
_cell_angle_alpha   76.056
_cell_angle_beta   76.056
_cell_angle_gamma   32.598
_symmetry_Int_Tables_number   1
_cell_volume   282.517
_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
  Ce  Ce0  1  0.888  0.888  0.419  1.0
  Y  Y1  1  0.700  0.700  0.187  1.0
  Y  Y2  1  0.300  0.300  0.812  1.0
  Y  Y3  1  0.113  0.113  0.582  1.0
  Y  Y4  1  1.000  1.000  0.998  1.0
  S  S5  1  0.045  0.045  0.210  1.0
  S  S6  1  0.957  0.957  0.785  1.0
  S  S7  1  0.739  0.739  0.652  1.0
  S  S8  1  0.253  0.253  0.351  1.0
  S  S9  1  0.342  0.342  0.052  1.0
  S  S10  1  0.659  0.659  0.948  1.0
  S  S11  1  0.504  0.504  0.503  1.0
[/CIF]
.
The structure described by CeY4S7 crystallizes in the monoclinic Cm space group. Ce(1) is bonded to one S(1), one S(3), two equivalent S(4), and two equivalent S(7) atoms to form CeS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Y(3)S6 octahedra, corners with two equivalent Y(2)S7 pentagonal bipyramids, corners with four equivalent Y(1)S7 pentagonal bipyramids, edges with two equivalent Ce(1)S6 octahedra, edges with three equivalent Y(3)S6 octahedra, and  an edgeedge with one Y(1)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 2-58°. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to one S(6), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms to form distorted YS7 pentagonal bipyramids that share corners with two equivalent Y(3)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, corners with four equivalent Ce(1)S6 octahedra,  an edgeedge with one Ce(1)S6 octahedra, edges with three equivalent Y(4)S6 octahedra, edges with two equivalent Y(2)S7 pentagonal bipyramids, and faces with two equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 21-65°. In the second Y site, Y(2) is bonded to one S(5), two equivalent S(2), two equivalent S(3), and two equivalent S(6) atoms to form distorted YS7 pentagonal bipyramids that share corners with two equivalent Ce(1)S6 octahedra, corners with two equivalent Y(4)S6 octahedra, corners with four equivalent Y(3)S6 octahedra,  an edgeedge with one Y(3)S6 octahedra, edges with three equivalent Y(4)S6 octahedra, edges with two equivalent Y(1)S7 pentagonal bipyramids, and faces with two equivalent Y(2)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. In the third Y site, Y(3) is bonded to one S(2), one S(4), two equivalent S(3), and two equivalent S(7) atoms to form YS6 octahedra that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Ce(1)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, corners with four equivalent Y(2)S7 pentagonal bipyramids, edges with two equivalent Y(3)S6 octahedra, edges with three equivalent Ce(1)S6 octahedra, and  an edgeedge with one Y(2)S7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 2-58°. In the fourth Y site, Y(4) is bonded to one S(1), one S(2), two equivalent S(5), and two equivalent S(6) atoms to form YS6 octahedra that share  a cornercorner with one Ce(1)S6 octahedra,  a cornercorner with one Y(3)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, corners with two equivalent Y(2)S7 pentagonal bipyramids, edges with two equivalent Y(4)S6 octahedra, edges with three equivalent Y(1)S7 pentagonal bipyramids, and edges with three equivalent Y(2)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 58°. There are seven inequivalent S sites. In the first S site, S(1) is bonded to one Ce(1), one Y(4), and two equivalent Y(1) atoms to form SCeY3 tetrahedra that share  a cornercorner with one S(2)Y4 tetrahedra, corners with two equivalent S(1)CeY3 tetrahedra,  a cornercorner with one S(3)CeY4 trigonal bipyramid, corners with four equivalent S(4)Ce2Y3 trigonal bipyramids, corners with four equivalent S(5)Y5 trigonal bipyramids,  an edgeedge with one S(4)Ce2Y3 trigonal bipyramid,  an edgeedge with one S(5)Y5 trigonal bipyramid, and edges with two equivalent S(6)Y5 trigonal bipyramids. In the second S site, S(2) is bonded to one Y(3), one Y(4), and two equivalent Y(2) atoms to form distorted SY4 tetrahedra that share  a cornercorner with one S(1)CeY3 tetrahedra, corners with two equivalent S(2)Y4 tetrahedra,  a cornercorner with one S(4)Ce2Y3 trigonal bipyramid, corners with four equivalent S(3)CeY4 trigonal bipyramids, corners with four equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(3)CeY4 trigonal bipyramid,  an edgeedge with one S(6)Y5 trigonal bipyramid, and edges with two equivalent S(5)Y5 trigonal bipyramids. In the third S site, S(3) is bonded to one Ce(1), two equivalent Y(2), and two equivalent Y(3) atoms to form SCeY4 trigonal bipyramids that share  a cornercorner with one S(1)CeY3 tetrahedra, corners with four equivalent S(2)Y4 tetrahedra, corners with two equivalent S(5)Y5 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y4 tetrahedra,  an edgeedge with one S(6)Y5 trigonal bipyramid, edges with two equivalent S(4)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(3)CeY4 trigonal bipyramids. In the fourth S site, S(4) is bonded to two equivalent Ce(1), one Y(3), and two equivalent Y(1) atoms to form SCe2Y3 trigonal bipyramids that share  a cornercorner with one S(2)Y4 tetrahedra, corners with four equivalent S(1)CeY3 tetrahedra, corners with two equivalent S(5)Y5 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(1)CeY3 tetrahedra,  an edgeedge with one S(5)Y5 trigonal bipyramid, edges with two equivalent S(4)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(3)CeY4 trigonal bipyramids. In the fifth S site, S(5) is bonded to one Y(2), two equivalent Y(1), and two equivalent Y(4) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(1)CeY3 tetrahedra, corners with two equivalent S(4)Ce2Y3 trigonal bipyramids, corners with two equivalent S(3)CeY4 trigonal bipyramids, corners with two equivalent S(6)Y5 trigonal bipyramids,  an edgeedge with one S(1)CeY3 tetrahedra, edges with two equivalent S(2)Y4 tetrahedra,  an edgeedge with one S(4)Ce2Y3 trigonal bipyramid, edges with two equivalent S(5)Y5 trigonal bipyramids, and edges with three equivalent S(6)Y5 trigonal bipyramids. In the sixth S site, S(6) is bonded to one Y(1), two equivalent Y(2), and two equivalent Y(4) atoms to form distorted SY5 trigonal bipyramids that share corners with four equivalent S(2)Y4 tetrahedra, corners with two equivalent S(4)Ce2Y3 trigonal bipyramids, corners with two equivalent S(3)CeY4 trigonal bipyramids, corners with two equivalent S(5)Y5 trigonal bipyramids,  an edgeedge with one S(2)Y4 tetrahedra, edges with two equivalent S(1)CeY3 tetrahedra,  an edgeedge with one S(3)CeY4 trigonal bipyramid, edges with two equivalent S(6)Y5 trigonal bipyramids, and edges with three equivalent S(5)Y5 trigonal bipyramids. In the seventh S site, S(7) is bonded in a square co-planar geometry to two equivalent Ce(1) and two equivalent Y(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeY4S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.805
_cell_length_b   6.805
_cell_length_c   11.701
_cell_angle_alpha   76.056
_cell_angle_beta   76.056
_cell_angle_gamma   32.598
_symmetry_Int_Tables_number   1
_cell_volume   282.517
_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
  Ce  Ce0  1  0.888  0.888  0.419  1.0
  Y  Y1  1  0.700  0.700  0.187  1.0
  Y  Y2  1  0.300  0.300  0.812  1.0
  Y  Y3  1  0.113  0.113  0.582  1.0
  Y  Y4  1  1.000  1.000  0.998  1.0
  S  S5  1  0.045  0.045  0.210  1.0
  S  S6  1  0.957  0.957  0.785  1.0
  S  S7  1  0.739  0.739  0.652  1.0
  S  S8  1  0.253  0.253  0.351  1.0
  S  S9  1  0.342  0.342  0.052  1.0
  S  S10  1  0.659  0.659  0.948  1.0
  S  S11  1  0.504  0.504  0.503  1.0
[/CIF]
.