The structure described by EuGd2S4 crystallizes in the tetragonal I-42d space group. Gd(1) is bonded to eight equivalent S(1) atoms to form distorted GdS8 hexagonal bipyramids that share corners with four equivalent Gd(1)S8 hexagonal bipyramids, corners with four equivalent Eu(1)S8 hexagonal bipyramids, edges with four equivalent Gd(1)S8 hexagonal bipyramids, faces with four equivalent Gd(1)S8 hexagonal bipyramids, and faces with four equivalent Eu(1)S8 hexagonal bipyramids. Eu(1) is bonded to eight equivalent S(1) atoms to form distorted EuS8 hexagonal bipyramids that share corners with eight equivalent Gd(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Gd(1)S8 hexagonal bipyramids. S(1) is bonded to four equivalent Gd(1) and two equivalent Eu(1) atoms to form a mixture of distorted edge, corner, and face-sharing SEu2Gd4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF card [CIF]
data_Eu(GdS2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.362
_cell_length_b   7.362
_cell_length_c   7.362
_cell_angle_alpha   109.293
_cell_angle_beta   109.292
_cell_angle_gamma   109.828
_symmetry_Int_Tables_number   1
_cell_volume   307.166
_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
  Eu  Eu0  1  0.250  0.750  0.500  1.0
  Eu  Eu1  1  0.000  0.000  0.000  1.0
  Gd  Gd2  1  0.125  0.501  0.876  1.0
  Gd  Gd3  1  0.751  0.875  0.376  1.0
  Gd  Gd4  1  0.625  0.249  0.124  1.0
  Gd  Gd5  1  0.499  0.375  0.624  1.0
  S  S6  1  0.867  0.615  0.601  1.0
  S  S7  1  0.237  0.135  0.752  1.0
  S  S8  1  0.515  0.763  0.899  1.0
  S  S9  1  0.865  0.617  0.101  1.0
  S  S10  1  0.013  0.265  0.399  1.0
  S  S11  1  0.385  0.987  0.252  1.0
  S  S12  1  0.735  0.133  0.748  1.0
  S  S13  1  0.383  0.485  0.248  1.0
[/CIF]
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The structure described by EuGd2S4 crystallizes in the tetragonal I-42d space group. Gd(1) is bonded to eight equivalent S(1) atoms to form distorted GdS8 hexagonal bipyramids that share corners with four equivalent Gd(1)S8 hexagonal bipyramids, corners with four equivalent Eu(1)S8 hexagonal bipyramids, edges with four equivalent Gd(1)S8 hexagonal bipyramids, faces with four equivalent Gd(1)S8 hexagonal bipyramids, and faces with four equivalent Eu(1)S8 hexagonal bipyramids. Eu(1) is bonded to eight equivalent S(1) atoms to form distorted EuS8 hexagonal bipyramids that share corners with eight equivalent Gd(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Gd(1)S8 hexagonal bipyramids. S(1) is bonded to four equivalent Gd(1) and two equivalent Eu(1) atoms to form a mixture of distorted edge, corner, and face-sharing SEu2Gd4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF card [CIF]
data_Eu(GdS2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.362
_cell_length_b   7.362
_cell_length_c   7.362
_cell_angle_alpha   109.293
_cell_angle_beta   109.292
_cell_angle_gamma   109.828
_symmetry_Int_Tables_number   1
_cell_volume   307.166
_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
  Eu  Eu0  1  0.250  0.750  0.500  1.0
  Eu  Eu1  1  0.000  0.000  0.000  1.0
  Gd  Gd2  1  0.125  0.501  0.876  1.0
  Gd  Gd3  1  0.751  0.875  0.376  1.0
  Gd  Gd4  1  0.625  0.249  0.124  1.0
  Gd  Gd5  1  0.499  0.375  0.624  1.0
  S  S6  1  0.867  0.615  0.601  1.0
  S  S7  1  0.237  0.135  0.752  1.0
  S  S8  1  0.515  0.763  0.899  1.0
  S  S9  1  0.865  0.617  0.101  1.0
  S  S10  1  0.013  0.265  0.399  1.0
  S  S11  1  0.385  0.987  0.252  1.0
  S  S12  1  0.735  0.133  0.748  1.0
  S  S13  1  0.383  0.485  0.248  1.0
[/CIF]
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