The compound described by Eu2Se3 crystallizes in the orthorhombic Fddd space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 7°. In the second Eu site, Eu(2) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles range from 6-7°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a rectangular see-saw-like geometry to two equivalent Eu(1) and two equivalent Eu(2) atoms. In the second Se site, Se(2) is bonded in a rectangular see-saw-like geometry to two equivalent Eu(1) and two equivalent Eu(2) atoms. is represented by the CIF card [CIF]
data_Eu2Se3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.379
_cell_length_b   7.379
_cell_length_c   13.552
_cell_angle_alpha   100.446
_cell_angle_beta   100.446
_cell_angle_gamma   109.517
_symmetry_Int_Tables_number   1
_cell_volume   660.349
_cell_formula_units_Z   4
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  0.710  0.960  0.921  1.0
  Eu  Eu1  1  0.540  0.790  0.579  1.0
  Eu  Eu2  1  0.290  0.040  0.079  1.0
  Eu  Eu3  1  0.460  0.210  0.421  1.0
  Eu  Eu4  1  0.371  0.621  0.243  1.0
  Eu  Eu5  1  0.879  0.129  0.257  1.0
  Eu  Eu6  1  0.629  0.379  0.757  1.0
  Eu  Eu7  1  0.121  0.871  0.743  1.0
  Se  Se8  1  0.857  0.107  0.750  1.0
  Se  Se9  1  0.393  0.643  0.750  1.0
  Se  Se10  1  0.143  0.893  0.250  1.0
  Se  Se11  1  0.607  0.357  0.250  1.0
  Se  Se12  1  0.550  0.816  0.090  1.0
  Se  Se13  1  0.684  0.950  0.410  1.0
  Se  Se14  1  0.226  0.461  0.410  1.0
  Se  Se15  1  0.039  0.274  0.090  1.0
  Se  Se16  1  0.450  0.184  0.910  1.0
  Se  Se17  1  0.316  0.050  0.590  1.0
  Se  Se18  1  0.774  0.539  0.590  1.0
  Se  Se19  1  0.961  0.726  0.910  1.0
[/CIF]
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The compound described by Eu2Se3 crystallizes in the orthorhombic Fddd space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 7°. In the second Eu site, Eu(2) is bonded to two equivalent Se(1) and four equivalent Se(2) atoms to form a mixture of edge and corner-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles range from 6-7°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a rectangular see-saw-like geometry to two equivalent Eu(1) and two equivalent Eu(2) atoms. In the second Se site, Se(2) is bonded in a rectangular see-saw-like geometry to two equivalent Eu(1) and two equivalent Eu(2) atoms. is represented by the CIF card [CIF]
data_Eu2Se3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.379
_cell_length_b   7.379
_cell_length_c   13.552
_cell_angle_alpha   100.446
_cell_angle_beta   100.446
_cell_angle_gamma   109.517
_symmetry_Int_Tables_number   1
_cell_volume   660.349
_cell_formula_units_Z   4
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  0.710  0.960  0.921  1.0
  Eu  Eu1  1  0.540  0.790  0.579  1.0
  Eu  Eu2  1  0.290  0.040  0.079  1.0
  Eu  Eu3  1  0.460  0.210  0.421  1.0
  Eu  Eu4  1  0.371  0.621  0.243  1.0
  Eu  Eu5  1  0.879  0.129  0.257  1.0
  Eu  Eu6  1  0.629  0.379  0.757  1.0
  Eu  Eu7  1  0.121  0.871  0.743  1.0
  Se  Se8  1  0.857  0.107  0.750  1.0
  Se  Se9  1  0.393  0.643  0.750  1.0
  Se  Se10  1  0.143  0.893  0.250  1.0
  Se  Se11  1  0.607  0.357  0.250  1.0
  Se  Se12  1  0.550  0.816  0.090  1.0
  Se  Se13  1  0.684  0.950  0.410  1.0
  Se  Se14  1  0.226  0.461  0.410  1.0
  Se  Se15  1  0.039  0.274  0.090  1.0
  Se  Se16  1  0.450  0.184  0.910  1.0
  Se  Se17  1  0.316  0.050  0.590  1.0
  Se  Se18  1  0.774  0.539  0.590  1.0
  Se  Se19  1  0.961  0.726  0.910  1.0
[/CIF]
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