The crystal structure described by Pb2O3 crystallizes in the monoclinic Pm space group. There are six inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form a mixture of edge and corner-sharing PbO6 octahedra. The corner-sharing octahedral tilt angles range from 30-33°. In the second Pb site, Pb(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form a mixture of edge and corner-sharing PbO6 octahedra. The corner-sharing octahedral tilt angles range from 33-36°. In the third Pb site, Pb(3) is bonded in a 4-coordinate geometry to two equivalent O(5) and two equivalent O(8) atoms. In the fourth Pb site, Pb(4) is bonded in a 6-coordinate geometry to one O(1), one O(3), two equivalent O(6), and two equivalent O(7) atoms. In the fifth Pb site, Pb(5) is bonded in a 4-coordinate geometry to two equivalent O(6) and two equivalent O(7) atoms. In the sixth Pb site, Pb(6) is bonded in a 4-coordinate geometry to two equivalent O(5) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Pb(4) and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Pb(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Pb(4) and two equivalent Pb(2) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the sixth O site, O(6) is bonded to one Pb(1), one Pb(2), one Pb(4), and one Pb(5) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the seventh O site, O(7) is bonded to one Pb(1), one Pb(2), one Pb(4), and one Pb(5) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the eighth O site, O(8) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pb2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.470
_cell_length_b   5.470
_cell_length_c   5.719
_cell_angle_alpha   92.022
_cell_angle_beta   92.022
_cell_angle_gamma   100.869
_symmetry_Int_Tables_number   1
_cell_volume   167.793
_cell_formula_units_Z   2
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
  O  O0  1  0.001  0.001  0.891  1.0
  O  O1  1  0.497  0.497  0.108  1.0
  O  O2  1  0.489  0.987  0.742  1.0
  O  O3  1  0.987  0.489  0.742  1.0
  O  O4  1  0.519  0.011  0.260  1.0
  O  O5  1  0.011  0.519  0.260  1.0
  Pb  Pb6  1  0.250  0.750  0.000  1.0
  Pb  Pb7  1  0.750  0.250  0.000  1.0
  Pb  Pb8  1  0.249  0.249  0.499  1.0
  Pb  Pb9  1  0.747  0.747  0.500  1.0
[/CIF]
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The crystal structure described by Pb2O3 crystallizes in the monoclinic Pm space group. There are six inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form a mixture of edge and corner-sharing PbO6 octahedra. The corner-sharing octahedral tilt angles range from 30-33°. In the second Pb site, Pb(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form a mixture of edge and corner-sharing PbO6 octahedra. The corner-sharing octahedral tilt angles range from 33-36°. In the third Pb site, Pb(3) is bonded in a 4-coordinate geometry to two equivalent O(5) and two equivalent O(8) atoms. In the fourth Pb site, Pb(4) is bonded in a 6-coordinate geometry to one O(1), one O(3), two equivalent O(6), and two equivalent O(7) atoms. In the fifth Pb site, Pb(5) is bonded in a 4-coordinate geometry to two equivalent O(6) and two equivalent O(7) atoms. In the sixth Pb site, Pb(6) is bonded in a 4-coordinate geometry to two equivalent O(5) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Pb(4) and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Pb(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Pb(4) and two equivalent Pb(2) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Pb(2) atoms. In the fifth O site, O(5) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the sixth O site, O(6) is bonded to one Pb(1), one Pb(2), one Pb(4), and one Pb(5) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the seventh O site, O(7) is bonded to one Pb(1), one Pb(2), one Pb(4), and one Pb(5) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the eighth O site, O(8) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pb2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.470
_cell_length_b   5.470
_cell_length_c   5.719
_cell_angle_alpha   92.022
_cell_angle_beta   92.022
_cell_angle_gamma   100.869
_symmetry_Int_Tables_number   1
_cell_volume   167.793
_cell_formula_units_Z   2
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
  O  O0  1  0.001  0.001  0.891  1.0
  O  O1  1  0.497  0.497  0.108  1.0
  O  O2  1  0.489  0.987  0.742  1.0
  O  O3  1  0.987  0.489  0.742  1.0
  O  O4  1  0.519  0.011  0.260  1.0
  O  O5  1  0.011  0.519  0.260  1.0
  Pb  Pb6  1  0.250  0.750  0.000  1.0
  Pb  Pb7  1  0.750  0.250  0.000  1.0
  Pb  Pb8  1  0.249  0.249  0.499  1.0
  Pb  Pb9  1  0.747  0.747  0.500  1.0
[/CIF]
.