The structure described by Bi3O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing BiO6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 34-35°. In the second Bi site, Bi(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Bi(1) atoms. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the third O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Bi(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Bi3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.909
_cell_length_b   7.939
_cell_length_c   12.082
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   662.739
_cell_formula_units_Z   4
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  0.242  0.755  0.037  1.0
  Bi  Bi1  1  0.742  0.745  0.963  1.0
  Bi  Bi2  1  0.758  0.245  0.537  1.0
  Bi  Bi3  1  0.258  0.255  0.463  1.0
  Bi  Bi4  1  0.243  0.734  0.750  1.0
  Bi  Bi5  1  0.743  0.766  0.250  1.0
  Bi  Bi6  1  0.757  0.266  0.250  1.0
  Bi  Bi7  1  0.257  0.234  0.750  1.0
  Bi  Bi8  1  0.742  0.745  0.537  1.0
  Bi  Bi9  1  0.242  0.755  0.463  1.0
  Bi  Bi10  1  0.258  0.255  0.037  1.0
  Bi  Bi11  1  0.758  0.245  0.963  1.0
  O  O12  1  0.562  0.215  0.108  1.0
  O  O13  1  0.062  0.285  0.892  1.0
  O  O14  1  0.438  0.785  0.608  1.0
  O  O15  1  0.938  0.715  0.392  1.0
  O  O16  1  0.438  0.785  0.892  1.0
  O  O17  1  0.938  0.715  0.108  1.0
  O  O18  1  0.562  0.215  0.392  1.0
  O  O19  1  0.062  0.285  0.608  1.0
  O  O20  1  0.949  0.299  0.107  1.0
  O  O21  1  0.449  0.201  0.893  1.0
  O  O22  1  0.051  0.701  0.607  1.0
  O  O23  1  0.551  0.799  0.393  1.0
  O  O24  1  0.051  0.701  0.893  1.0
  O  O25  1  0.551  0.799  0.107  1.0
  O  O26  1  0.949  0.299  0.393  1.0
  O  O27  1  0.449  0.201  0.607  1.0
  O  O28  1  0.152  0.987  0.750  1.0
  O  O29  1  0.652  0.513  0.250  1.0
  O  O30  1  0.848  0.013  0.250  1.0
  O  O31  1  0.348  0.487  0.750  1.0
  O  O32  1  0.317  0.507  0.417  1.0
  O  O33  1  0.817  0.993  0.583  1.0
  O  O34  1  0.683  0.493  0.917  1.0
  O  O35  1  0.183  0.007  0.083  1.0
  O  O36  1  0.683  0.493  0.583  1.0
  O  O37  1  0.183  0.007  0.417  1.0
  O  O38  1  0.317  0.507  0.083  1.0
  O  O39  1  0.817  0.993  0.917  1.0
[/CIF]
.
The structure described by Bi3O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing BiO6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 34-35°. In the second Bi site, Bi(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Bi(1) atoms. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the third O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the fourth O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Bi(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Bi3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.909
_cell_length_b   7.939
_cell_length_c   12.082
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   662.739
_cell_formula_units_Z   4
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  0.242  0.755  0.037  1.0
  Bi  Bi1  1  0.742  0.745  0.963  1.0
  Bi  Bi2  1  0.758  0.245  0.537  1.0
  Bi  Bi3  1  0.258  0.255  0.463  1.0
  Bi  Bi4  1  0.243  0.734  0.750  1.0
  Bi  Bi5  1  0.743  0.766  0.250  1.0
  Bi  Bi6  1  0.757  0.266  0.250  1.0
  Bi  Bi7  1  0.257  0.234  0.750  1.0
  Bi  Bi8  1  0.742  0.745  0.537  1.0
  Bi  Bi9  1  0.242  0.755  0.463  1.0
  Bi  Bi10  1  0.258  0.255  0.037  1.0
  Bi  Bi11  1  0.758  0.245  0.963  1.0
  O  O12  1  0.562  0.215  0.108  1.0
  O  O13  1  0.062  0.285  0.892  1.0
  O  O14  1  0.438  0.785  0.608  1.0
  O  O15  1  0.938  0.715  0.392  1.0
  O  O16  1  0.438  0.785  0.892  1.0
  O  O17  1  0.938  0.715  0.108  1.0
  O  O18  1  0.562  0.215  0.392  1.0
  O  O19  1  0.062  0.285  0.608  1.0
  O  O20  1  0.949  0.299  0.107  1.0
  O  O21  1  0.449  0.201  0.893  1.0
  O  O22  1  0.051  0.701  0.607  1.0
  O  O23  1  0.551  0.799  0.393  1.0
  O  O24  1  0.051  0.701  0.893  1.0
  O  O25  1  0.551  0.799  0.107  1.0
  O  O26  1  0.949  0.299  0.393  1.0
  O  O27  1  0.449  0.201  0.607  1.0
  O  O28  1  0.152  0.987  0.750  1.0
  O  O29  1  0.652  0.513  0.250  1.0
  O  O30  1  0.848  0.013  0.250  1.0
  O  O31  1  0.348  0.487  0.750  1.0
  O  O32  1  0.317  0.507  0.417  1.0
  O  O33  1  0.817  0.993  0.583  1.0
  O  O34  1  0.683  0.493  0.917  1.0
  O  O35  1  0.183  0.007  0.083  1.0
  O  O36  1  0.683  0.493  0.583  1.0
  O  O37  1  0.183  0.007  0.417  1.0
  O  O38  1  0.317  0.507  0.083  1.0
  O  O39  1  0.817  0.993  0.917  1.0
[/CIF]
.