The compound described by Ce4(YS2)11 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one S(1), one S(9), two equivalent S(6), two equivalent S(7), and two equivalent S(8) atoms. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to one S(4), one S(8), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. There are six inequivalent Y sites. In the first Y site, Y(1) is bonded to one S(2), one S(9), two equivalent S(8), and three equivalent S(11) atoms to form distorted YS7 pentagonal bipyramids that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Y(3)S6 octahedra, edges with two equivalent Y(4)S6 octahedra, and edges with four equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 40-50°. In the second Y site, Y(2) is bonded to one S(4), one S(7), two equivalent S(1), and two equivalent S(10) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the third Y site, Y(3) is bonded to one S(3), one S(6), two equivalent S(5), and two equivalent S(9) atoms to form YS6 octahedra that share corners with three equivalent Y(4)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, edges with two equivalent Y(3)S6 octahedra, and edges with two equivalent Y(5)S6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the fourth Y site, Y(4) is bonded to one S(11), two equivalent S(2), and three equivalent S(3) atoms to form YS6 octahedra that share corners with three equivalent Y(3)S6 octahedra,  a cornercorner with one Y(1)S7 pentagonal bipyramid, edges with four equivalent Y(4)S6 octahedra, and edges with two equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-63°. In the fifth Y site, Y(5) is bonded to one S(10), one S(5), two equivalent S(4), and two equivalent S(6) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the sixth Y site, Y(6) is bonded to two equivalent S(10) and four equivalent S(7) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are eleven inequivalent S sites. In the first S site, S(1) is bonded to one Ce(1), two equivalent Ce(2), and two equivalent Y(2) atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(2)Ce2Y3 trigonal bipyramids,  a cornercorner with one S(9)CeY3 trigonal pyramid,  an edgeedge with one S(5)Ce2Y3 square pyramid, edges with two equivalent S(7)Ce2Y3 square pyramids,  an edgeedge with one S(2)Ce2Y3 trigonal bipyramid, edges with two equivalent S(1)Ce3Y2 trigonal bipyramids, and edges with two equivalent S(8)Ce3Y2 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Ce(2), one Y(1), and two equivalent Y(4) atoms to form SCe2Y3 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids,  a cornercorner with one S(9)CeY3 trigonal pyramid,  a cornercorner with one S(11)Y4 trigonal pyramid,  an edgeedge with one S(5)Ce2Y3 square pyramid,  an edgeedge with one S(1)Ce3Y2 trigonal bipyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, edges with two equivalent S(8)Ce3Y2 trigonal bipyramids, and edges with two equivalent S(11)Y4 trigonal pyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Y(3) and three equivalent Y(4) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Ce(2), one Y(2), and two equivalent Y(5) atoms. In the fifth S site, S(5) is bonded to two equivalent Ce(2), one Y(5), and two equivalent Y(3) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(2)Ce2Y3 trigonal bipyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(9)CeY3 trigonal pyramids, edges with two equivalent S(5)Ce2Y3 square pyramids, edges with two equivalent S(6)Ce2Y3 square pyramids,  an edgeedge with one S(2)Ce2Y3 trigonal bipyramid,  an edgeedge with one S(1)Ce3Y2 trigonal bipyramid, and  an edgeedge with one S(9)CeY3 trigonal pyramid. In the sixth S site, S(6) is bonded to two equivalent Ce(1), one Y(3), and two equivalent Y(5) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(7)Ce2Y3 square pyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids,  an edgeedge with one S(7)Ce2Y3 square pyramid, edges with two equivalent S(5)Ce2Y3 square pyramids, edges with two equivalent S(6)Ce2Y3 square pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, and edges with two equivalent S(9)CeY3 trigonal pyramids. In the seventh S site, S(7) is bonded to two equivalent Ce(1), one Y(2), and two equivalent Y(6) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(9)CeY3 trigonal pyramids,  an edgeedge with one S(6)Ce2Y3 square pyramid, edges with three equivalent S(7)Ce2Y3 square pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, and edges with two equivalent S(1)Ce3Y2 trigonal bipyramids. In the eighth S site, S(8) is bonded to one Ce(2), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids, corners with four equivalent S(11)Y4 trigonal pyramids,  an edgeedge with one S(6)Ce2Y3 square pyramid,  an edgeedge with one S(7)Ce2Y3 square pyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, edges with two equivalent S(1)Ce3Y2 trigonal bipyramids, edges with two equivalent S(8)Ce3Y2 trigonal bipyramids,  an edgeedge with one S(11)Y4 trigonal pyramid, and edges with two equivalent S(9)CeY3 trigonal pyramids. In the ninth S site, S(9) is bonded to one Ce(1), one Y(1), and two equivalent Y(3) atoms to form SCeY3 trigonal pyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids,  a cornercorner with one S(2)Ce2Y3 trigonal bipyramid,  a cornercorner with one S(1)Ce3Y2 trigonal bipyramid, corners with two equivalent S(9)CeY3 trigonal pyramids, corners with three equivalent S(11)Y4 trigonal pyramids,  an edgeedge with one S(5)Ce2Y3 square pyramid, edges with two equivalent S(6)Ce2Y3 square pyramids, and edges with two equivalent S(8)Ce3Y2 trigonal bipyramids. In the tenth S site, S(10) is bonded in a rectangular see-saw-like geometry to one Y(5), one Y(6), and two equivalent Y(2) atoms. In the eleventh S site, S(11) is bonded to one Y(4) and three equivalent Y(1) atoms to form distorted SY4 trigonal pyramids that share  a cornercorner with one S(2)Ce2Y3 trigonal bipyramid, corners with four equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(11)Y4 trigonal pyramids, corners with three equivalent S(9)CeY3 trigonal pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(11)Y4 trigonal pyramids. is represented by the CIF card [CIF]
data_Ce4(YS2)11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.730
_cell_length_b   19.730
_cell_length_c   11.408
_cell_angle_alpha   88.394
_cell_angle_beta   88.394
_cell_angle_gamma   11.516
_symmetry_Int_Tables_number   1
_cell_volume   886.183
_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  0.104  0.104  0.989  1.0
  Ce  Ce1  1  0.896  0.896  0.011  1.0
  Ce  Ce2  1  0.367  0.367  0.652  1.0
  Ce  Ce3  1  0.633  0.633  0.348  1.0
  Y  Y4  1  0.798  0.798  0.941  1.0
  Y  Y5  1  0.202  0.202  0.059  1.0
  Y  Y6  1  0.462  0.462  0.730  1.0
  Y  Y7  1  0.538  0.538  0.270  1.0
  Y  Y8  1  0.658  0.658  0.699  1.0
  Y  Y9  1  0.342  0.342  0.301  1.0
  Y  Y10  1  0.263  0.263  0.649  1.0
  Y  Y11  1  0.737  0.737  0.351  1.0
  Y  Y12  1  0.070  0.070  0.639  1.0
  Y  Y13  1  0.930  0.930  0.361  1.0
  Y  Y14  1  0.000  0.000  0.000  1.0
  S  S15  1  0.088  0.088  0.248  1.0
  S  S16  1  0.912  0.912  0.752  1.0
  S  S17  1  0.189  0.189  0.310  1.0
  S  S18  1  0.811  0.811  0.690  1.0
  S  S19  1  0.280  0.280  0.411  1.0
  S  S20  1  0.720  0.720  0.589  1.0
  S  S21  1  0.445  0.445  0.507  1.0
  S  S22  1  0.555  0.555  0.493  1.0
  S  S23  1  0.135  0.135  0.546  1.0
  S  S24  1  0.865  0.865  0.454  1.0
  S  S25  1  0.593  0.593  0.789  1.0
  S  S26  1  0.407  0.407  0.211  1.0
  S  S27  1  0.453  0.453  0.969  1.0
  S  S28  1  0.547  0.547  0.031  1.0
  S  S29  1  0.351  0.351  0.908  1.0
  S  S30  1  0.649  0.649  0.092  1.0
  S  S31  1  0.169  0.169  0.849  1.0
  S  S32  1  0.831  0.831  0.151  1.0
  S  S33  1  0.008  0.008  0.760  1.0
  S  S34  1  0.992  0.992  0.240  1.0
  S  S35  1  0.255  0.255  0.881  1.0
  S  S36  1  0.745  0.745  0.119  1.0
[/CIF]
.
The compound described by Ce4(YS2)11 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to one S(1), one S(9), two equivalent S(6), two equivalent S(7), and two equivalent S(8) atoms. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to one S(4), one S(8), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. There are six inequivalent Y sites. In the first Y site, Y(1) is bonded to one S(2), one S(9), two equivalent S(8), and three equivalent S(11) atoms to form distorted YS7 pentagonal bipyramids that share  a cornercorner with one Y(4)S6 octahedra, corners with two equivalent Y(3)S6 octahedra, edges with two equivalent Y(4)S6 octahedra, and edges with four equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 40-50°. In the second Y site, Y(2) is bonded to one S(4), one S(7), two equivalent S(1), and two equivalent S(10) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the third Y site, Y(3) is bonded to one S(3), one S(6), two equivalent S(5), and two equivalent S(9) atoms to form YS6 octahedra that share corners with three equivalent Y(4)S6 octahedra, corners with two equivalent Y(1)S7 pentagonal bipyramids, edges with two equivalent Y(3)S6 octahedra, and edges with two equivalent Y(5)S6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the fourth Y site, Y(4) is bonded to one S(11), two equivalent S(2), and three equivalent S(3) atoms to form YS6 octahedra that share corners with three equivalent Y(3)S6 octahedra,  a cornercorner with one Y(1)S7 pentagonal bipyramid, edges with four equivalent Y(4)S6 octahedra, and edges with two equivalent Y(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-63°. In the fifth Y site, Y(5) is bonded to one S(10), one S(5), two equivalent S(4), and two equivalent S(6) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the sixth Y site, Y(6) is bonded to two equivalent S(10) and four equivalent S(7) atoms to form a mixture of corner and edge-sharing YS6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are eleven inequivalent S sites. In the first S site, S(1) is bonded to one Ce(1), two equivalent Ce(2), and two equivalent Y(2) atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(2)Ce2Y3 trigonal bipyramids,  a cornercorner with one S(9)CeY3 trigonal pyramid,  an edgeedge with one S(5)Ce2Y3 square pyramid, edges with two equivalent S(7)Ce2Y3 square pyramids,  an edgeedge with one S(2)Ce2Y3 trigonal bipyramid, edges with two equivalent S(1)Ce3Y2 trigonal bipyramids, and edges with two equivalent S(8)Ce3Y2 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Ce(2), one Y(1), and two equivalent Y(4) atoms to form SCe2Y3 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids,  a cornercorner with one S(9)CeY3 trigonal pyramid,  a cornercorner with one S(11)Y4 trigonal pyramid,  an edgeedge with one S(5)Ce2Y3 square pyramid,  an edgeedge with one S(1)Ce3Y2 trigonal bipyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, edges with two equivalent S(8)Ce3Y2 trigonal bipyramids, and edges with two equivalent S(11)Y4 trigonal pyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Y(3) and three equivalent Y(4) atoms. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Ce(2), one Y(2), and two equivalent Y(5) atoms. In the fifth S site, S(5) is bonded to two equivalent Ce(2), one Y(5), and two equivalent Y(3) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(2)Ce2Y3 trigonal bipyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(9)CeY3 trigonal pyramids, edges with two equivalent S(5)Ce2Y3 square pyramids, edges with two equivalent S(6)Ce2Y3 square pyramids,  an edgeedge with one S(2)Ce2Y3 trigonal bipyramid,  an edgeedge with one S(1)Ce3Y2 trigonal bipyramid, and  an edgeedge with one S(9)CeY3 trigonal pyramid. In the sixth S site, S(6) is bonded to two equivalent Ce(1), one Y(3), and two equivalent Y(5) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(7)Ce2Y3 square pyramids, corners with two equivalent S(1)Ce3Y2 trigonal bipyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids,  an edgeedge with one S(7)Ce2Y3 square pyramid, edges with two equivalent S(5)Ce2Y3 square pyramids, edges with two equivalent S(6)Ce2Y3 square pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, and edges with two equivalent S(9)CeY3 trigonal pyramids. In the seventh S site, S(7) is bonded to two equivalent Ce(1), one Y(2), and two equivalent Y(6) atoms to form SCe2Y3 square pyramids that share corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids, corners with two equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(9)CeY3 trigonal pyramids,  an edgeedge with one S(6)Ce2Y3 square pyramid, edges with three equivalent S(7)Ce2Y3 square pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, and edges with two equivalent S(1)Ce3Y2 trigonal bipyramids. In the eighth S site, S(8) is bonded to one Ce(2), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted SCe3Y2 trigonal bipyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(6)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids, corners with four equivalent S(11)Y4 trigonal pyramids,  an edgeedge with one S(6)Ce2Y3 square pyramid,  an edgeedge with one S(7)Ce2Y3 square pyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, edges with two equivalent S(1)Ce3Y2 trigonal bipyramids, edges with two equivalent S(8)Ce3Y2 trigonal bipyramids,  an edgeedge with one S(11)Y4 trigonal pyramid, and edges with two equivalent S(9)CeY3 trigonal pyramids. In the ninth S site, S(9) is bonded to one Ce(1), one Y(1), and two equivalent Y(3) atoms to form SCeY3 trigonal pyramids that share corners with two equivalent S(5)Ce2Y3 square pyramids, corners with two equivalent S(7)Ce2Y3 square pyramids,  a cornercorner with one S(2)Ce2Y3 trigonal bipyramid,  a cornercorner with one S(1)Ce3Y2 trigonal bipyramid, corners with two equivalent S(9)CeY3 trigonal pyramids, corners with three equivalent S(11)Y4 trigonal pyramids,  an edgeedge with one S(5)Ce2Y3 square pyramid, edges with two equivalent S(6)Ce2Y3 square pyramids, and edges with two equivalent S(8)Ce3Y2 trigonal bipyramids. In the tenth S site, S(10) is bonded in a rectangular see-saw-like geometry to one Y(5), one Y(6), and two equivalent Y(2) atoms. In the eleventh S site, S(11) is bonded to one Y(4) and three equivalent Y(1) atoms to form distorted SY4 trigonal pyramids that share  a cornercorner with one S(2)Ce2Y3 trigonal bipyramid, corners with four equivalent S(8)Ce3Y2 trigonal bipyramids, corners with two equivalent S(11)Y4 trigonal pyramids, corners with three equivalent S(9)CeY3 trigonal pyramids,  an edgeedge with one S(8)Ce3Y2 trigonal bipyramid, edges with two equivalent S(2)Ce2Y3 trigonal bipyramids, and edges with two equivalent S(11)Y4 trigonal pyramids. is represented by the CIF card [CIF]
data_Ce4(YS2)11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.730
_cell_length_b   19.730
_cell_length_c   11.408
_cell_angle_alpha   88.394
_cell_angle_beta   88.394
_cell_angle_gamma   11.516
_symmetry_Int_Tables_number   1
_cell_volume   886.183
_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  0.104  0.104  0.989  1.0
  Ce  Ce1  1  0.896  0.896  0.011  1.0
  Ce  Ce2  1  0.367  0.367  0.652  1.0
  Ce  Ce3  1  0.633  0.633  0.348  1.0
  Y  Y4  1  0.798  0.798  0.941  1.0
  Y  Y5  1  0.202  0.202  0.059  1.0
  Y  Y6  1  0.462  0.462  0.730  1.0
  Y  Y7  1  0.538  0.538  0.270  1.0
  Y  Y8  1  0.658  0.658  0.699  1.0
  Y  Y9  1  0.342  0.342  0.301  1.0
  Y  Y10  1  0.263  0.263  0.649  1.0
  Y  Y11  1  0.737  0.737  0.351  1.0
  Y  Y12  1  0.070  0.070  0.639  1.0
  Y  Y13  1  0.930  0.930  0.361  1.0
  Y  Y14  1  0.000  0.000  0.000  1.0
  S  S15  1  0.088  0.088  0.248  1.0
  S  S16  1  0.912  0.912  0.752  1.0
  S  S17  1  0.189  0.189  0.310  1.0
  S  S18  1  0.811  0.811  0.690  1.0
  S  S19  1  0.280  0.280  0.411  1.0
  S  S20  1  0.720  0.720  0.589  1.0
  S  S21  1  0.445  0.445  0.507  1.0
  S  S22  1  0.555  0.555  0.493  1.0
  S  S23  1  0.135  0.135  0.546  1.0
  S  S24  1  0.865  0.865  0.454  1.0
  S  S25  1  0.593  0.593  0.789  1.0
  S  S26  1  0.407  0.407  0.211  1.0
  S  S27  1  0.453  0.453  0.969  1.0
  S  S28  1  0.547  0.547  0.031  1.0
  S  S29  1  0.351  0.351  0.908  1.0
  S  S30  1  0.649  0.649  0.092  1.0
  S  S31  1  0.169  0.169  0.849  1.0
  S  S32  1  0.831  0.831  0.151  1.0
  S  S33  1  0.008  0.008  0.760  1.0
  S  S34  1  0.992  0.992  0.240  1.0
  S  S35  1  0.255  0.255  0.881  1.0
  S  S36  1  0.745  0.745  0.119  1.0
[/CIF]
.