The structure described by Ce4CrS7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(4), one S(7), and two equivalent S(5) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(5), one S(7), and two equivalent S(6) atoms. In the third Ce site, Ce(3) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(6), one S(7), and two equivalent S(4) atoms. In the fourth Ce site, Ce(4) is bonded in a 7-coordinate geometry to one S(1), one S(3), one S(5), one S(6), one S(7), and two equivalent S(4) atoms. Cr(1) is bonded to one S(1), two equivalent S(2), and two equivalent S(3) atoms to form edge-sharing CrS5 square pyramids. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one Cr(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), and two equivalent Cr(1) atoms. In the third S site, S(3) is bonded in a 6-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and two equivalent Cr(1) atoms. In the fourth S site, S(4) is bonded to one Ce(1), two equivalent Ce(3), and two equivalent Ce(4) atoms to form distorted SCe5 trigonal bipyramids that share  a cornercorner with one S(7)Ce4 tetrahedra, corners with two equivalent S(5)Ce4 trigonal pyramids, edges with two equivalent S(7)Ce4 tetrahedra, edges with two equivalent S(4)Ce5 trigonal bipyramids, and  an edgeedge with one S(5)Ce4 trigonal pyramid. In the fifth S site, S(5) is bonded to one Ce(2), one Ce(4), and two equivalent Ce(1) atoms to form distorted SCe4 trigonal pyramids that share corners with two equivalent S(7)Ce4 tetrahedra, corners with two equivalent S(4)Ce5 trigonal bipyramids, corners with two equivalent S(5)Ce4 trigonal pyramids,  an edgeedge with one S(7)Ce4 tetrahedra, and  an edgeedge with one S(4)Ce5 trigonal bipyramid. In the sixth S site, S(6) is bonded in a distorted rectangular see-saw-like geometry to one Ce(3), one Ce(4), and two equivalent Ce(2) atoms. In the seventh S site, S(7) is bonded to one Ce(1), one Ce(2), one Ce(3), and one Ce(4) atom to form SCe4 tetrahedra that share  a cornercorner with one S(4)Ce5 trigonal bipyramid, corners with two equivalent S(5)Ce4 trigonal pyramids, edges with two equivalent S(4)Ce5 trigonal bipyramids, and  an edgeedge with one S(5)Ce4 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce4CrS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.846
_cell_length_b   9.698
_cell_length_c   9.800
_cell_angle_alpha   118.777
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   570.323
_cell_formula_units_Z   2
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  0.276  0.231  0.380  1.0
  Ce  Ce1  1  0.241  0.623  0.837  1.0
  Ce  Ce2  1  0.289  0.158  0.789  1.0
  Ce  Ce3  1  0.776  0.769  0.620  1.0
  Ce  Ce4  1  0.741  0.377  0.163  1.0
  Ce  Ce5  1  0.789  0.842  0.211  1.0
  Ce  Ce6  1  0.803  0.258  0.629  1.0
  Ce  Ce7  1  0.303  0.742  0.371  1.0
  Cr  Cr8  1  0.466  0.011  0.024  1.0
  Cr  Cr9  1  0.966  0.989  0.976  1.0
  S  S10  1  0.674  0.149  0.273  1.0
  S  S11  1  0.693  0.782  0.909  1.0
  S  S12  1  0.687  0.103  0.876  1.0
  S  S13  1  0.174  0.851  0.727  1.0
  S  S14  1  0.193  0.218  0.091  1.0
  S  S15  1  0.187  0.897  0.124  1.0
  S  S16  1  0.083  0.037  0.496  1.0
  S  S17  1  0.999  0.467  0.561  1.0
  S  S18  1  0.010  0.419  0.903  1.0
  S  S19  1  0.583  0.963  0.504  1.0
  S  S20  1  0.499  0.533  0.439  1.0
  S  S21  1  0.510  0.581  0.097  1.0
  S  S22  1  0.434  0.350  0.677  1.0
  S  S23  1  0.934  0.650  0.323  1.0
[/CIF]
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The structure described by Ce4CrS7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(4), one S(7), and two equivalent S(5) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(5), one S(7), and two equivalent S(6) atoms. In the third Ce site, Ce(3) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(3), one S(6), one S(7), and two equivalent S(4) atoms. In the fourth Ce site, Ce(4) is bonded in a 7-coordinate geometry to one S(1), one S(3), one S(5), one S(6), one S(7), and two equivalent S(4) atoms. Cr(1) is bonded to one S(1), two equivalent S(2), and two equivalent S(3) atoms to form edge-sharing CrS5 square pyramids. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and one Cr(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), and two equivalent Cr(1) atoms. In the third S site, S(3) is bonded in a 6-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Ce(4), and two equivalent Cr(1) atoms. In the fourth S site, S(4) is bonded to one Ce(1), two equivalent Ce(3), and two equivalent Ce(4) atoms to form distorted SCe5 trigonal bipyramids that share  a cornercorner with one S(7)Ce4 tetrahedra, corners with two equivalent S(5)Ce4 trigonal pyramids, edges with two equivalent S(7)Ce4 tetrahedra, edges with two equivalent S(4)Ce5 trigonal bipyramids, and  an edgeedge with one S(5)Ce4 trigonal pyramid. In the fifth S site, S(5) is bonded to one Ce(2), one Ce(4), and two equivalent Ce(1) atoms to form distorted SCe4 trigonal pyramids that share corners with two equivalent S(7)Ce4 tetrahedra, corners with two equivalent S(4)Ce5 trigonal bipyramids, corners with two equivalent S(5)Ce4 trigonal pyramids,  an edgeedge with one S(7)Ce4 tetrahedra, and  an edgeedge with one S(4)Ce5 trigonal bipyramid. In the sixth S site, S(6) is bonded in a distorted rectangular see-saw-like geometry to one Ce(3), one Ce(4), and two equivalent Ce(2) atoms. In the seventh S site, S(7) is bonded to one Ce(1), one Ce(2), one Ce(3), and one Ce(4) atom to form SCe4 tetrahedra that share  a cornercorner with one S(4)Ce5 trigonal bipyramid, corners with two equivalent S(5)Ce4 trigonal pyramids, edges with two equivalent S(4)Ce5 trigonal bipyramids, and  an edgeedge with one S(5)Ce4 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce4CrS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.846
_cell_length_b   9.698
_cell_length_c   9.800
_cell_angle_alpha   118.777
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   570.323
_cell_formula_units_Z   2
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  0.276  0.231  0.380  1.0
  Ce  Ce1  1  0.241  0.623  0.837  1.0
  Ce  Ce2  1  0.289  0.158  0.789  1.0
  Ce  Ce3  1  0.776  0.769  0.620  1.0
  Ce  Ce4  1  0.741  0.377  0.163  1.0
  Ce  Ce5  1  0.789  0.842  0.211  1.0
  Ce  Ce6  1  0.803  0.258  0.629  1.0
  Ce  Ce7  1  0.303  0.742  0.371  1.0
  Cr  Cr8  1  0.466  0.011  0.024  1.0
  Cr  Cr9  1  0.966  0.989  0.976  1.0
  S  S10  1  0.674  0.149  0.273  1.0
  S  S11  1  0.693  0.782  0.909  1.0
  S  S12  1  0.687  0.103  0.876  1.0
  S  S13  1  0.174  0.851  0.727  1.0
  S  S14  1  0.193  0.218  0.091  1.0
  S  S15  1  0.187  0.897  0.124  1.0
  S  S16  1  0.083  0.037  0.496  1.0
  S  S17  1  0.999  0.467  0.561  1.0
  S  S18  1  0.010  0.419  0.903  1.0
  S  S19  1  0.583  0.963  0.504  1.0
  S  S20  1  0.499  0.533  0.439  1.0
  S  S21  1  0.510  0.581  0.097  1.0
  S  S22  1  0.434  0.350  0.677  1.0
  S  S23  1  0.934  0.650  0.323  1.0
[/CIF]
.