The structure described by EuSeO4 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with six equivalent Se(1)O4 tetrahedra and edges with two equivalent Eu(1)O6 octahedra. Se(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SeO4 tetrahedra that share corners with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-56°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Eu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuSeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.396
_cell_length_b   5.396
_cell_length_c   7.996
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   113.632
_symmetry_Int_Tables_number   1
_cell_volume   213.277
_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  0.000  0.000  0.000  1.0
  Eu  Eu1  1  0.000  0.000  0.500  1.0
  Se  Se2  1  0.637  0.363  0.250  1.0
  Se  Se3  1  0.363  0.637  0.750  1.0
  O  O4  1  0.230  0.289  0.750  1.0
  O  O5  1  0.289  0.230  0.250  1.0
  O  O6  1  0.737  0.263  0.073  1.0
  O  O7  1  0.737  0.263  0.427  1.0
  O  O8  1  0.263  0.737  0.573  1.0
  O  O9  1  0.263  0.737  0.927  1.0
  O  O10  1  0.770  0.711  0.250  1.0
  O  O11  1  0.711  0.770  0.750  1.0
[/CIF]
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The structure described by EuSeO4 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form EuO6 octahedra that share corners with six equivalent Se(1)O4 tetrahedra and edges with two equivalent Eu(1)O6 octahedra. Se(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SeO4 tetrahedra that share corners with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-56°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Eu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Eu(1) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuSeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.396
_cell_length_b   5.396
_cell_length_c   7.996
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   113.632
_symmetry_Int_Tables_number   1
_cell_volume   213.277
_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  0.000  0.000  0.000  1.0
  Eu  Eu1  1  0.000  0.000  0.500  1.0
  Se  Se2  1  0.637  0.363  0.250  1.0
  Se  Se3  1  0.363  0.637  0.750  1.0
  O  O4  1  0.230  0.289  0.750  1.0
  O  O5  1  0.289  0.230  0.250  1.0
  O  O6  1  0.737  0.263  0.073  1.0
  O  O7  1  0.737  0.263  0.427  1.0
  O  O8  1  0.263  0.737  0.573  1.0
  O  O9  1  0.263  0.737  0.927  1.0
  O  O10  1  0.770  0.711  0.250  1.0
  O  O11  1  0.711  0.770  0.750  1.0
[/CIF]
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