The material described by EuNd2S4 crystallizes in the tetragonal I-42d space group. Eu(1) is bonded to eight equivalent S(1) atoms to form distorted EuS8 hexagonal bipyramids that share corners with eight equivalent Nd(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Nd(1)S8 hexagonal bipyramids. Nd(1) is bonded to eight equivalent S(1) atoms to form distorted NdS8 hexagonal bipyramids that share corners with four equivalent Eu(1)S8 hexagonal bipyramids, corners with four equivalent Nd(1)S8 hexagonal bipyramids, edges with four equivalent Nd(1)S8 hexagonal bipyramids, faces with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with four equivalent Nd(1)S8 hexagonal bipyramids. S(1) is bonded to two equivalent Eu(1) and four equivalent Nd(1) atoms to form a mixture of distorted corner, edge, and face-sharing SNd4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 16-51°. is represented by the CIF card [CIF]
data_Nd2EuS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.477
_cell_length_b   7.477
_cell_length_c   7.477
_cell_angle_alpha   109.395
_cell_angle_beta   109.396
_cell_angle_gamma   109.623
_symmetry_Int_Tables_number   1
_cell_volume   321.747
_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
  Nd  Nd0  1  0.997  0.375  0.122  1.0
  Nd  Nd1  1  0.625  0.747  0.622  1.0
  Nd  Nd2  1  0.253  0.875  0.878  1.0
  Nd  Nd3  1  0.125  0.003  0.378  1.0
  Eu  Eu4  1  0.750  0.250  0.500  1.0
  Eu  Eu5  1  0.500  0.500  0.000  1.0
  S  S6  1  0.519  0.119  0.750  1.0
  S  S7  1  0.731  0.980  0.100  1.0
  S  S8  1  0.881  0.631  0.400  1.0
  S  S9  1  0.230  0.481  0.600  1.0
  S  S10  1  0.369  0.269  0.250  1.0
  S  S11  1  0.881  0.631  0.900  1.0
  S  S12  1  0.369  0.770  0.250  1.0
  S  S13  1  0.020  0.119  0.750  1.0
[/CIF]
.
The material described by EuNd2S4 crystallizes in the tetragonal I-42d space group. Eu(1) is bonded to eight equivalent S(1) atoms to form distorted EuS8 hexagonal bipyramids that share corners with eight equivalent Nd(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with eight equivalent Nd(1)S8 hexagonal bipyramids. Nd(1) is bonded to eight equivalent S(1) atoms to form distorted NdS8 hexagonal bipyramids that share corners with four equivalent Eu(1)S8 hexagonal bipyramids, corners with four equivalent Nd(1)S8 hexagonal bipyramids, edges with four equivalent Nd(1)S8 hexagonal bipyramids, faces with four equivalent Eu(1)S8 hexagonal bipyramids, and faces with four equivalent Nd(1)S8 hexagonal bipyramids. S(1) is bonded to two equivalent Eu(1) and four equivalent Nd(1) atoms to form a mixture of distorted corner, edge, and face-sharing SNd4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 16-51°. is represented by the CIF card [CIF]
data_Nd2EuS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.477
_cell_length_b   7.477
_cell_length_c   7.477
_cell_angle_alpha   109.395
_cell_angle_beta   109.396
_cell_angle_gamma   109.623
_symmetry_Int_Tables_number   1
_cell_volume   321.747
_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
  Nd  Nd0  1  0.997  0.375  0.122  1.0
  Nd  Nd1  1  0.625  0.747  0.622  1.0
  Nd  Nd2  1  0.253  0.875  0.878  1.0
  Nd  Nd3  1  0.125  0.003  0.378  1.0
  Eu  Eu4  1  0.750  0.250  0.500  1.0
  Eu  Eu5  1  0.500  0.500  0.000  1.0
  S  S6  1  0.519  0.119  0.750  1.0
  S  S7  1  0.731  0.980  0.100  1.0
  S  S8  1  0.881  0.631  0.400  1.0
  S  S9  1  0.230  0.481  0.600  1.0
  S  S10  1  0.369  0.269  0.250  1.0
  S  S11  1  0.881  0.631  0.900  1.0
  S  S12  1  0.369  0.770  0.250  1.0
  S  S13  1  0.020  0.119  0.750  1.0
[/CIF]
.