The material structure described by Y2SeO2 crystallizes in the trigonal P-3m1 space group. Y(1) is bonded in a 7-coordinate geometry to three equivalent Se(1) and four equivalent O(1) atoms. Se(1) is bonded to six equivalent Y(1) atoms to form SeY6 octahedra that share corners with twelve equivalent O(1)Y4 tetrahedra, edges with six equivalent Se(1)Y6 octahedra, and edges with six equivalent O(1)Y4 tetrahedra. O(1) is bonded to four equivalent Y(1) atoms to form OY4 tetrahedra that share corners with six equivalent Se(1)Y6 octahedra, corners with six equivalent O(1)Y4 tetrahedra, edges with three equivalent Se(1)Y6 octahedra, and edges with three equivalent O(1)Y4 tetrahedra. The corner-sharing octahedral tilt angles range from 27-48°. is represented by the CIF card [CIF]
data_Y2SeO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.831
_cell_length_b   3.831
_cell_length_c   6.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   86.405
_cell_formula_units_Z   1
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
  Y  Y0  1  0.333  0.667  0.291  1.0
  Y  Y1  1  0.667  0.333  0.709  1.0
  Se  Se2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.333  0.667  0.626  1.0
  O  O4  1  0.667  0.333  0.374  1.0
[/CIF]
.
The material structure described by Y2SeO2 crystallizes in the trigonal P-3m1 space group. Y(1) is bonded in a 7-coordinate geometry to three equivalent Se(1) and four equivalent O(1) atoms. Se(1) is bonded to six equivalent Y(1) atoms to form SeY6 octahedra that share corners with twelve equivalent O(1)Y4 tetrahedra, edges with six equivalent Se(1)Y6 octahedra, and edges with six equivalent O(1)Y4 tetrahedra. O(1) is bonded to four equivalent Y(1) atoms to form OY4 tetrahedra that share corners with six equivalent Se(1)Y6 octahedra, corners with six equivalent O(1)Y4 tetrahedra, edges with three equivalent Se(1)Y6 octahedra, and edges with three equivalent O(1)Y4 tetrahedra. The corner-sharing octahedral tilt angles range from 27-48°. is represented by the CIF card [CIF]
data_Y2SeO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.831
_cell_length_b   3.831
_cell_length_c   6.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   86.405
_cell_formula_units_Z   1
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
  Y  Y0  1  0.333  0.667  0.291  1.0
  Y  Y1  1  0.667  0.333  0.709  1.0
  Se  Se2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.333  0.667  0.626  1.0
  O  O4  1  0.667  0.333  0.374  1.0
[/CIF]
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