The structure described by EuYb2S4 crystallizes in the tetragonal I-42d space group. Yb(1) is bonded to eight equivalent S(1) atoms to form distorted YbS8 hexagonal bipyramids that share corners with four equivalent Yb(1)S8 hexagonal bipyramids, corners with four equivalent Eu(1)S8 hexagonal bipyramids, edges with four equivalent Yb(1)S8 hexagonal bipyramids, faces with four equivalent Yb(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 Yb(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Yb(1)S8 hexagonal bipyramids. S(1) is bonded to four equivalent Yb(1) and two equivalent Eu(1) atoms to form a mixture of distorted face, corner, and edge-sharing SYb4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 14-51°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb2EuS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.180
_cell_length_b   7.180
_cell_length_c   7.180
_cell_angle_alpha   109.521
_cell_angle_beta   109.521
_cell_angle_gamma   109.371
_symmetry_Int_Tables_number   1
_cell_volume   284.980
_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
  Yb  Yb0  1  0.375  0.000  0.125  1.0
  Yb  Yb1  1  0.750  0.625  0.625  1.0
  Yb  Yb2  1  0.875  0.250  0.875  1.0
  Yb  Yb3  1  1.000  0.125  0.375  1.0
  Eu  Eu4  1  0.250  0.750  0.500  1.0
  Eu  Eu5  1  0.500  0.500  0.000  1.0
  S  S6  1  0.625  0.875  0.415  1.0
  S  S7  1  0.290  0.375  0.250  1.0
  S  S8  1  0.625  0.875  0.915  1.0
  S  S9  1  0.960  0.710  0.085  1.0
  S  S10  1  0.460  0.210  0.585  1.0
  S  S11  1  0.125  0.540  0.750  1.0
  S  S12  1  0.790  0.375  0.250  1.0
  S  S13  1  0.125  0.040  0.750  1.0
[/CIF]
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The structure described by EuYb2S4 crystallizes in the tetragonal I-42d space group. Yb(1) is bonded to eight equivalent S(1) atoms to form distorted YbS8 hexagonal bipyramids that share corners with four equivalent Yb(1)S8 hexagonal bipyramids, corners with four equivalent Eu(1)S8 hexagonal bipyramids, edges with four equivalent Yb(1)S8 hexagonal bipyramids, faces with four equivalent Yb(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 Yb(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Yb(1)S8 hexagonal bipyramids. S(1) is bonded to four equivalent Yb(1) and two equivalent Eu(1) atoms to form a mixture of distorted face, corner, and edge-sharing SYb4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 14-51°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb2EuS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.180
_cell_length_b   7.180
_cell_length_c   7.180
_cell_angle_alpha   109.521
_cell_angle_beta   109.521
_cell_angle_gamma   109.371
_symmetry_Int_Tables_number   1
_cell_volume   284.980
_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
  Yb  Yb0  1  0.375  0.000  0.125  1.0
  Yb  Yb1  1  0.750  0.625  0.625  1.0
  Yb  Yb2  1  0.875  0.250  0.875  1.0
  Yb  Yb3  1  1.000  0.125  0.375  1.0
  Eu  Eu4  1  0.250  0.750  0.500  1.0
  Eu  Eu5  1  0.500  0.500  0.000  1.0
  S  S6  1  0.625  0.875  0.415  1.0
  S  S7  1  0.290  0.375  0.250  1.0
  S  S8  1  0.625  0.875  0.915  1.0
  S  S9  1  0.960  0.710  0.085  1.0
  S  S10  1  0.460  0.210  0.585  1.0
  S  S11  1  0.125  0.540  0.750  1.0
  S  S12  1  0.790  0.375  0.250  1.0
  S  S13  1  0.125  0.040  0.750  1.0
[/CIF]
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