The material structure described by Bi2O3 crystallizes in the monoclinic Pm space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Bi(1) and two equivalent Bi(2) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded to two equivalent Bi(1) and two equivalent Bi(2) atoms to form a mixture of distorted corner and edge-sharing OBi4 tetrahedra. is represented by the CIF card [CIF]
data_Bi2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.218
_cell_length_b   8.198
_cell_length_c   7.330
_cell_angle_alpha   26.566
_cell_angle_beta   49.214
_cell_angle_gamma   54.264
_symmetry_Int_Tables_number   1
_cell_volume   85.833
_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
  Bi  Bi0  1  0.941  0.000  0.028  1.0
  Bi  Bi1  1  0.016  0.500  0.990  1.0
  O  O2  1  0.277  0.000  0.217  1.0
  O  O3  1  0.032  0.999  0.683  1.0
  O  O4  1  0.696  0.500  0.760  1.0
[/CIF]
.
The material structure described by Bi2O3 crystallizes in the monoclinic Pm space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Bi(1) and two equivalent Bi(2) atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded to two equivalent Bi(1) and two equivalent Bi(2) atoms to form a mixture of distorted corner and edge-sharing OBi4 tetrahedra. is represented by the CIF card [CIF]
data_Bi2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.218
_cell_length_b   8.198
_cell_length_c   7.330
_cell_angle_alpha   26.566
_cell_angle_beta   49.214
_cell_angle_gamma   54.264
_symmetry_Int_Tables_number   1
_cell_volume   85.833
_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
  Bi  Bi0  1  0.941  0.000  0.028  1.0
  Bi  Bi1  1  0.016  0.500  0.990  1.0
  O  O2  1  0.277  0.000  0.217  1.0
  O  O3  1  0.032  0.999  0.683  1.0
  O  O4  1  0.696  0.500  0.760  1.0
[/CIF]
.