The structure described by Eu2SnSe5 crystallizes in the orthorhombic Pbam space group. Eu(1) is bonded in a 9-coordinate geometry to two equivalent Se(1), three equivalent Se(3), and four equivalent Se(2) atoms. Sn(1) is bonded to two equivalent Se(2) and four equivalent Se(3) atoms to form edge-sharing SnSe6 octahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a square co-planar geometry to four equivalent Eu(1) atoms. In the second Se site, Se(2) is bonded to four equivalent Eu(1) and one Sn(1) atom to form a mixture of corner and edge-sharing SeEu4Sn square pyramids. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to three equivalent Eu(1) and two equivalent Sn(1) atoms. is represented by the CIF card [CIF]
data_Eu2SnSe5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.089
_cell_length_b   8.225
_cell_length_c   11.997
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   403.492
_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  0.500  0.595  0.173  1.0
  Eu  Eu1  1  0.500  0.405  0.827  1.0
  Eu  Eu2  1  0.500  0.905  0.673  1.0
  Eu  Eu3  1  0.500  0.095  0.327  1.0
  Sn  Sn4  1  0.000  0.500  0.500  1.0
  Sn  Sn5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.000  0.000  0.500  1.0
  Se  Se7  1  0.000  0.500  0.000  1.0
  Se  Se8  1  0.000  0.873  0.205  1.0
  Se  Se9  1  0.000  0.127  0.795  1.0
  Se  Se10  1  0.000  0.627  0.705  1.0
  Se  Se11  1  0.000  0.373  0.295  1.0
  Se  Se12  1  0.500  0.705  0.438  1.0
  Se  Se13  1  0.500  0.295  0.562  1.0
  Se  Se14  1  0.500  0.795  0.938  1.0
  Se  Se15  1  0.500  0.205  0.062  1.0
[/CIF]
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The structure described by Eu2SnSe5 crystallizes in the orthorhombic Pbam space group. Eu(1) is bonded in a 9-coordinate geometry to two equivalent Se(1), three equivalent Se(3), and four equivalent Se(2) atoms. Sn(1) is bonded to two equivalent Se(2) and four equivalent Se(3) atoms to form edge-sharing SnSe6 octahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a square co-planar geometry to four equivalent Eu(1) atoms. In the second Se site, Se(2) is bonded to four equivalent Eu(1) and one Sn(1) atom to form a mixture of corner and edge-sharing SeEu4Sn square pyramids. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to three equivalent Eu(1) and two equivalent Sn(1) atoms. is represented by the CIF card [CIF]
data_Eu2SnSe5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.089
_cell_length_b   8.225
_cell_length_c   11.997
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   403.492
_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  0.500  0.595  0.173  1.0
  Eu  Eu1  1  0.500  0.405  0.827  1.0
  Eu  Eu2  1  0.500  0.905  0.673  1.0
  Eu  Eu3  1  0.500  0.095  0.327  1.0
  Sn  Sn4  1  0.000  0.500  0.500  1.0
  Sn  Sn5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.000  0.000  0.500  1.0
  Se  Se7  1  0.000  0.500  0.000  1.0
  Se  Se8  1  0.000  0.873  0.205  1.0
  Se  Se9  1  0.000  0.127  0.795  1.0
  Se  Se10  1  0.000  0.627  0.705  1.0
  Se  Se11  1  0.000  0.373  0.295  1.0
  Se  Se12  1  0.500  0.705  0.438  1.0
  Se  Se13  1  0.500  0.295  0.562  1.0
  Se  Se14  1  0.500  0.795  0.938  1.0
  Se  Se15  1  0.500  0.205  0.062  1.0
[/CIF]
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