The structure described by Sm4CrS7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form face-sharing SmS6 octahedra. In the second Sm site, Sm(2) 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 third Sm site, Sm(3) 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 fourth Sm site, Sm(4) 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. Cr(1) is bonded in a tetrahedral geometry to one S(4), one S(5), one S(6), and one S(7) atom. There are seven inequivalent S sites. In the first S site, S(1) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(1)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(2)Sm5 square pyramids, edges with two equivalent S(3)Sm5 square pyramids,  a faceface with one S(2)Sm5 square pyramid, and  a faceface with one S(3)Sm5 square pyramid. In the second S site, S(2) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(2)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(1)Sm5 square pyramids, edges with two equivalent S(3)Sm5 square pyramids,  a faceface with one S(1)Sm5 square pyramid, and  a faceface with one S(3)Sm5 square pyramid. In the third S site, S(3) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(3)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(1)Sm5 square pyramids, edges with two equivalent S(2)Sm5 square pyramids,  a faceface with one S(1)Sm5 square pyramid, and  a faceface with one S(2)Sm5 square pyramid. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Sm(2), two equivalent Sm(4), and one Cr(1) atom. In the fifth S site, S(5) is bonded in a rectangular see-saw-like geometry to one Sm(3), two equivalent Sm(2), and one Cr(1) atom. In the sixth S site, S(6) is bonded in a rectangular see-saw-like geometry to one Sm(4), two equivalent Sm(3), and one Cr(1) atom. In the seventh S site, S(7) is bonded to one Sm(2), one Sm(3), one Sm(4), and one Cr(1) atom to form distorted corner-sharing SSm3Cr tetrahedra. is represented by the CIF card [CIF]
data_Sm4CrS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.007
_cell_length_b   6.484
_cell_length_c   10.010
_cell_angle_alpha   90.000
_cell_angle_beta   119.768
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   563.750
_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
  Sm  Sm0  1  1.000  0.549  1.000  1.0
  Sm  Sm1  1  0.000  0.049  0.000  1.0
  Sm  Sm2  1  0.851  0.733  0.250  1.0
  Sm  Sm3  1  0.750  0.734  0.601  1.0
  Sm  Sm4  1  0.399  0.733  0.150  1.0
  Sm  Sm5  1  0.149  0.233  0.750  1.0
  Sm  Sm6  1  0.250  0.234  0.399  1.0
  Sm  Sm7  1  0.601  0.233  0.850  1.0
  Cr  Cr8  1  0.668  0.154  0.333  1.0
  Cr  Cr9  1  0.332  0.654  0.667  1.0
  S  S10  1  0.894  0.305  0.150  1.0
  S  S11  1  0.850  0.305  0.745  1.0
  S  S12  1  0.256  0.306  0.106  1.0
  S  S13  1  0.106  0.805  0.850  1.0
  S  S14  1  0.150  0.805  0.255  1.0
  S  S15  1  0.744  0.806  0.894  1.0
  S  S16  1  0.582  0.990  0.097  1.0
  S  S17  1  0.904  0.990  0.485  1.0
  S  S18  1  0.515  0.991  0.417  1.0
  S  S19  1  0.418  0.490  0.903  1.0
  S  S20  1  0.096  0.490  0.515  1.0
  S  S21  1  0.485  0.491  0.583  1.0
  S  S22  1  0.666  0.520  0.334  1.0
  S  S23  1  0.334  0.020  0.666  1.0
[/CIF]
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The structure described by Sm4CrS7 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form face-sharing SmS6 octahedra. In the second Sm site, Sm(2) 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 third Sm site, Sm(3) 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 fourth Sm site, Sm(4) 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. Cr(1) is bonded in a tetrahedral geometry to one S(4), one S(5), one S(6), and one S(7) atom. There are seven inequivalent S sites. In the first S site, S(1) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(1)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(2)Sm5 square pyramids, edges with two equivalent S(3)Sm5 square pyramids,  a faceface with one S(2)Sm5 square pyramid, and  a faceface with one S(3)Sm5 square pyramid. In the second S site, S(2) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(2)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(1)Sm5 square pyramids, edges with two equivalent S(3)Sm5 square pyramids,  a faceface with one S(1)Sm5 square pyramid, and  a faceface with one S(3)Sm5 square pyramid. In the third S site, S(3) is bonded to one Sm(2), one Sm(3), one Sm(4), and two equivalent Sm(1) atoms to form distorted SSm5 square pyramids that share corners with two equivalent S(3)Sm5 square pyramids, corners with three equivalent S(7)Sm3Cr tetrahedra, edges with two equivalent S(1)Sm5 square pyramids, edges with two equivalent S(2)Sm5 square pyramids,  a faceface with one S(1)Sm5 square pyramid, and  a faceface with one S(2)Sm5 square pyramid. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Sm(2), two equivalent Sm(4), and one Cr(1) atom. In the fifth S site, S(5) is bonded in a rectangular see-saw-like geometry to one Sm(3), two equivalent Sm(2), and one Cr(1) atom. In the sixth S site, S(6) is bonded in a rectangular see-saw-like geometry to one Sm(4), two equivalent Sm(3), and one Cr(1) atom. In the seventh S site, S(7) is bonded to one Sm(2), one Sm(3), one Sm(4), and one Cr(1) atom to form distorted corner-sharing SSm3Cr tetrahedra. is represented by the CIF card [CIF]
data_Sm4CrS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.007
_cell_length_b   6.484
_cell_length_c   10.010
_cell_angle_alpha   90.000
_cell_angle_beta   119.768
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   563.750
_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
  Sm  Sm0  1  1.000  0.549  1.000  1.0
  Sm  Sm1  1  0.000  0.049  0.000  1.0
  Sm  Sm2  1  0.851  0.733  0.250  1.0
  Sm  Sm3  1  0.750  0.734  0.601  1.0
  Sm  Sm4  1  0.399  0.733  0.150  1.0
  Sm  Sm5  1  0.149  0.233  0.750  1.0
  Sm  Sm6  1  0.250  0.234  0.399  1.0
  Sm  Sm7  1  0.601  0.233  0.850  1.0
  Cr  Cr8  1  0.668  0.154  0.333  1.0
  Cr  Cr9  1  0.332  0.654  0.667  1.0
  S  S10  1  0.894  0.305  0.150  1.0
  S  S11  1  0.850  0.305  0.745  1.0
  S  S12  1  0.256  0.306  0.106  1.0
  S  S13  1  0.106  0.805  0.850  1.0
  S  S14  1  0.150  0.805  0.255  1.0
  S  S15  1  0.744  0.806  0.894  1.0
  S  S16  1  0.582  0.990  0.097  1.0
  S  S17  1  0.904  0.990  0.485  1.0
  S  S18  1  0.515  0.991  0.417  1.0
  S  S19  1  0.418  0.490  0.903  1.0
  S  S20  1  0.096  0.490  0.515  1.0
  S  S21  1  0.485  0.491  0.583  1.0
  S  S22  1  0.666  0.520  0.334  1.0
  S  S23  1  0.334  0.020  0.666  1.0
[/CIF]
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