The structure described by Bi2O3 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted corner-sharing BiO5 square pyramids. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms. In the third Bi site, Bi(3) is bonded to one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form distorted corner-sharing BiO5 square pyramids. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the second O site, O(6) is bonded in a trigonal planar geometry to one Bi(1), one Bi(2), and one Bi(4) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(4) and two equivalent Bi(3) atoms. In the fourth O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the fifth O site, O(3) is bonded in a distorted tetrahedral geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. is represented by the CIF file [CIF]
data_Bi2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.296
_cell_length_b   9.208
_cell_length_c   10.073
_cell_angle_alpha   77.462
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   660.560
_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
  Bi  Bi0  1  0.902  0.711  0.928  1.0
  Bi  Bi1  1  0.402  0.289  0.572  1.0
  Bi  Bi2  1  0.098  0.289  0.072  1.0
  Bi  Bi3  1  0.598  0.711  0.428  1.0
  Bi  Bi4  1  0.408  0.077  0.318  1.0
  Bi  Bi5  1  0.908  0.923  0.182  1.0
  Bi  Bi6  1  0.592  0.923  0.682  1.0
  Bi  Bi7  1  0.092  0.077  0.818  1.0
  Bi  Bi8  1  0.127  0.574  0.337  1.0
  Bi  Bi9  1  0.627  0.426  0.163  1.0
  Bi  Bi10  1  0.873  0.426  0.663  1.0
  Bi  Bi11  1  0.373  0.574  0.837  1.0
  Bi  Bi12  1  0.382  0.795  0.070  1.0
  Bi  Bi13  1  0.882  0.205  0.430  1.0
  Bi  Bi14  1  0.618  0.205  0.930  1.0
  Bi  Bi15  1  0.118  0.795  0.570  1.0
  O  O16  1  0.368  0.568  0.176  1.0
  O  O17  1  0.868  0.432  0.324  1.0
  O  O18  1  0.632  0.432  0.824  1.0
  O  O19  1  0.132  0.568  0.676  1.0
  O  O20  1  0.348  0.075  0.532  1.0
  O  O21  1  0.848  0.925  0.968  1.0
  O  O22  1  0.652  0.925  0.468  1.0
  O  O23  1  0.152  0.075  0.032  1.0
  O  O24  1  0.950  0.276  0.846  1.0
  O  O25  1  0.450  0.724  0.654  1.0
  O  O26  1  0.050  0.724  0.154  1.0
  O  O27  1  0.550  0.276  0.346  1.0
  O  O28  1  0.197  0.778  0.883  1.0
  O  O29  1  0.697  0.222  0.617  1.0
  O  O30  1  0.803  0.222  0.117  1.0
  O  O31  1  0.303  0.778  0.383  1.0
  O  O32  1  0.935  0.719  0.426  1.0
  O  O33  1  0.435  0.281  0.074  1.0
  O  O34  1  0.065  0.281  0.574  1.0
  O  O35  1  0.565  0.719  0.926  1.0
  O  O36  1  0.859  0.811  0.716  1.0
  O  O37  1  0.359  0.189  0.784  1.0
  O  O38  1  0.141  0.189  0.284  1.0
  O  O39  1  0.641  0.811  0.216  1.0
[/CIF]
.
The structure described by Bi2O3 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted corner-sharing BiO5 square pyramids. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms. In the third Bi site, Bi(3) is bonded to one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form distorted corner-sharing BiO5 square pyramids. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the second O site, O(6) is bonded in a trigonal planar geometry to one Bi(1), one Bi(2), and one Bi(4) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(4) and two equivalent Bi(3) atoms. In the fourth O site, O(2) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the fifth O site, O(3) is bonded in a distorted tetrahedral geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the sixth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. is represented by the CIF file [CIF]
data_Bi2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.296
_cell_length_b   9.208
_cell_length_c   10.073
_cell_angle_alpha   77.462
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   660.560
_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
  Bi  Bi0  1  0.902  0.711  0.928  1.0
  Bi  Bi1  1  0.402  0.289  0.572  1.0
  Bi  Bi2  1  0.098  0.289  0.072  1.0
  Bi  Bi3  1  0.598  0.711  0.428  1.0
  Bi  Bi4  1  0.408  0.077  0.318  1.0
  Bi  Bi5  1  0.908  0.923  0.182  1.0
  Bi  Bi6  1  0.592  0.923  0.682  1.0
  Bi  Bi7  1  0.092  0.077  0.818  1.0
  Bi  Bi8  1  0.127  0.574  0.337  1.0
  Bi  Bi9  1  0.627  0.426  0.163  1.0
  Bi  Bi10  1  0.873  0.426  0.663  1.0
  Bi  Bi11  1  0.373  0.574  0.837  1.0
  Bi  Bi12  1  0.382  0.795  0.070  1.0
  Bi  Bi13  1  0.882  0.205  0.430  1.0
  Bi  Bi14  1  0.618  0.205  0.930  1.0
  Bi  Bi15  1  0.118  0.795  0.570  1.0
  O  O16  1  0.368  0.568  0.176  1.0
  O  O17  1  0.868  0.432  0.324  1.0
  O  O18  1  0.632  0.432  0.824  1.0
  O  O19  1  0.132  0.568  0.676  1.0
  O  O20  1  0.348  0.075  0.532  1.0
  O  O21  1  0.848  0.925  0.968  1.0
  O  O22  1  0.652  0.925  0.468  1.0
  O  O23  1  0.152  0.075  0.032  1.0
  O  O24  1  0.950  0.276  0.846  1.0
  O  O25  1  0.450  0.724  0.654  1.0
  O  O26  1  0.050  0.724  0.154  1.0
  O  O27  1  0.550  0.276  0.346  1.0
  O  O28  1  0.197  0.778  0.883  1.0
  O  O29  1  0.697  0.222  0.617  1.0
  O  O30  1  0.803  0.222  0.117  1.0
  O  O31  1  0.303  0.778  0.383  1.0
  O  O32  1  0.935  0.719  0.426  1.0
  O  O33  1  0.435  0.281  0.074  1.0
  O  O34  1  0.065  0.281  0.574  1.0
  O  O35  1  0.565  0.719  0.926  1.0
  O  O36  1  0.859  0.811  0.716  1.0
  O  O37  1  0.359  0.189  0.784  1.0
  O  O38  1  0.141  0.189  0.284  1.0
  O  O39  1  0.641  0.811  0.216  1.0
[/CIF]
.