The material described by SeO3 is Indium-like structured and crystallizes in the tetragonal P-42_1c space group. The structure is zero-dimensional and consists of two SeO3 clusters. Se(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form corner-sharing SeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Se(1) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. is represented by the CIF file [CIF]
data_SeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.272
_cell_length_b   9.636
_cell_length_c   9.636
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   489.482
_cell_formula_units_Z   8
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
  Se  Se0  1  0.562  0.511  0.727  1.0
  Se  Se1  1  0.562  0.489  0.273  1.0
  Se  Se2  1  0.438  0.273  0.511  1.0
  Se  Se3  1  0.438  0.727  0.489  1.0
  Se  Se4  1  0.062  0.773  0.989  1.0
  Se  Se5  1  0.938  0.989  0.227  1.0
  Se  Se6  1  0.938  0.011  0.773  1.0
  Se  Se7  1  0.062  0.227  0.011  1.0
  O  O8  1  0.813  0.601  0.746  1.0
  O  O9  1  0.813  0.399  0.254  1.0
  O  O10  1  0.187  0.254  0.601  1.0
  O  O11  1  0.187  0.746  0.399  1.0
  O  O12  1  0.313  0.754  0.899  1.0
  O  O13  1  0.687  0.899  0.246  1.0
  O  O14  1  0.687  0.101  0.754  1.0
  O  O15  1  0.313  0.246  0.101  1.0
  O  O16  1  0.840  0.118  0.102  1.0
  O  O17  1  0.160  0.102  0.882  1.0
  O  O18  1  0.160  0.898  0.118  1.0
  O  O19  1  0.840  0.882  0.898  1.0
  O  O20  1  0.660  0.618  0.398  1.0
  O  O21  1  0.660  0.382  0.602  1.0
  O  O22  1  0.340  0.398  0.382  1.0
  O  O23  1  0.340  0.602  0.618  1.0
  O  O24  1  0.889  0.343  0.942  1.0
  O  O25  1  0.111  0.942  0.657  1.0
  O  O26  1  0.111  0.058  0.343  1.0
  O  O27  1  0.889  0.657  0.058  1.0
  O  O28  1  0.611  0.843  0.558  1.0
  O  O29  1  0.611  0.157  0.442  1.0
  O  O30  1  0.389  0.558  0.157  1.0
  O  O31  1  0.389  0.442  0.843  1.0
[/CIF]
.
The material described by SeO3 is Indium-like structured and crystallizes in the tetragonal P-42_1c space group. The structure is zero-dimensional and consists of two SeO3 clusters. Se(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form corner-sharing SeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Se(1) atoms. In the third O site, O(3) is bonded in a single-bond geometry to one Se(1) atom. is represented by the CIF file [CIF]
data_SeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.272
_cell_length_b   9.636
_cell_length_c   9.636
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   489.482
_cell_formula_units_Z   8
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
  Se  Se0  1  0.562  0.511  0.727  1.0
  Se  Se1  1  0.562  0.489  0.273  1.0
  Se  Se2  1  0.438  0.273  0.511  1.0
  Se  Se3  1  0.438  0.727  0.489  1.0
  Se  Se4  1  0.062  0.773  0.989  1.0
  Se  Se5  1  0.938  0.989  0.227  1.0
  Se  Se6  1  0.938  0.011  0.773  1.0
  Se  Se7  1  0.062  0.227  0.011  1.0
  O  O8  1  0.813  0.601  0.746  1.0
  O  O9  1  0.813  0.399  0.254  1.0
  O  O10  1  0.187  0.254  0.601  1.0
  O  O11  1  0.187  0.746  0.399  1.0
  O  O12  1  0.313  0.754  0.899  1.0
  O  O13  1  0.687  0.899  0.246  1.0
  O  O14  1  0.687  0.101  0.754  1.0
  O  O15  1  0.313  0.246  0.101  1.0
  O  O16  1  0.840  0.118  0.102  1.0
  O  O17  1  0.160  0.102  0.882  1.0
  O  O18  1  0.160  0.898  0.118  1.0
  O  O19  1  0.840  0.882  0.898  1.0
  O  O20  1  0.660  0.618  0.398  1.0
  O  O21  1  0.660  0.382  0.602  1.0
  O  O22  1  0.340  0.398  0.382  1.0
  O  O23  1  0.340  0.602  0.618  1.0
  O  O24  1  0.889  0.343  0.942  1.0
  O  O25  1  0.111  0.942  0.657  1.0
  O  O26  1  0.111  0.058  0.343  1.0
  O  O27  1  0.889  0.657  0.058  1.0
  O  O28  1  0.611  0.843  0.558  1.0
  O  O29  1  0.611  0.157  0.442  1.0
  O  O30  1  0.389  0.558  0.157  1.0
  O  O31  1  0.389  0.442  0.843  1.0
[/CIF]
.