The structure described by Pb2CO3Br2 crystallizes in the tetragonal P4/mbm space group. Pb(1) is bonded in a 7-coordinate geometry to one O(1), three equivalent O(2), one Br(2), and two equivalent Br(1) atoms. C(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Pb(1) and one C(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a rectangular see-saw-like geometry to four equivalent Pb(1) atoms. In the second Br site, Br(2) is bonded in an L-shaped geometry to two equivalent Pb(1) atoms. is represented by the CIF file [CIF]
data_Pb2CBr2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.480
_cell_length_b   8.480
_cell_length_c   9.232
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   663.839
_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
  Pb  Pb0  1  0.164  0.664  0.251  1.0
  Pb  Pb1  1  0.336  0.164  0.251  1.0
  Pb  Pb2  1  0.664  0.836  0.251  1.0
  Pb  Pb3  1  0.664  0.836  0.749  1.0
  Pb  Pb4  1  0.336  0.164  0.749  1.0
  Pb  Pb5  1  0.836  0.336  0.251  1.0
  Pb  Pb6  1  0.164  0.664  0.749  1.0
  Pb  Pb7  1  0.836  0.336  0.749  1.0
  C  C8  1  0.324  0.824  0.000  1.0
  C  C9  1  0.176  0.324  0.000  1.0
  C  C10  1  0.824  0.676  0.000  1.0
  C  C11  1  0.676  0.176  0.000  1.0
  Br  Br12  1  0.000  0.000  0.237  1.0
  Br  Br13  1  0.500  0.500  0.763  1.0
  Br  Br14  1  0.000  0.000  0.763  1.0
  Br  Br15  1  0.500  0.500  0.237  1.0
  Br  Br16  1  0.350  0.850  0.500  1.0
  Br  Br17  1  0.150  0.350  0.500  1.0
  Br  Br18  1  0.850  0.650  0.500  1.0
  Br  Br19  1  0.650  0.150  0.500  1.0
  O  O20  1  0.214  0.714  0.000  1.0
  O  O21  1  0.286  0.214  0.000  1.0
  O  O22  1  0.714  0.786  0.000  1.0
  O  O23  1  0.786  0.286  0.000  1.0
  O  O24  1  0.373  0.873  0.125  1.0
  O  O25  1  0.127  0.373  0.125  1.0
  O  O26  1  0.873  0.627  0.125  1.0
  O  O27  1  0.873  0.627  0.875  1.0
  O  O28  1  0.127  0.373  0.875  1.0
  O  O29  1  0.627  0.127  0.125  1.0
  O  O30  1  0.373  0.873  0.875  1.0
  O  O31  1  0.627  0.127  0.875  1.0
[/CIF]
.
The structure described by Pb2CO3Br2 crystallizes in the tetragonal P4/mbm space group. Pb(1) is bonded in a 7-coordinate geometry to one O(1), three equivalent O(2), one Br(2), and two equivalent Br(1) atoms. C(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Pb(1) and one C(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a rectangular see-saw-like geometry to four equivalent Pb(1) atoms. In the second Br site, Br(2) is bonded in an L-shaped geometry to two equivalent Pb(1) atoms. is represented by the CIF file [CIF]
data_Pb2CBr2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.480
_cell_length_b   8.480
_cell_length_c   9.232
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   663.839
_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
  Pb  Pb0  1  0.164  0.664  0.251  1.0
  Pb  Pb1  1  0.336  0.164  0.251  1.0
  Pb  Pb2  1  0.664  0.836  0.251  1.0
  Pb  Pb3  1  0.664  0.836  0.749  1.0
  Pb  Pb4  1  0.336  0.164  0.749  1.0
  Pb  Pb5  1  0.836  0.336  0.251  1.0
  Pb  Pb6  1  0.164  0.664  0.749  1.0
  Pb  Pb7  1  0.836  0.336  0.749  1.0
  C  C8  1  0.324  0.824  0.000  1.0
  C  C9  1  0.176  0.324  0.000  1.0
  C  C10  1  0.824  0.676  0.000  1.0
  C  C11  1  0.676  0.176  0.000  1.0
  Br  Br12  1  0.000  0.000  0.237  1.0
  Br  Br13  1  0.500  0.500  0.763  1.0
  Br  Br14  1  0.000  0.000  0.763  1.0
  Br  Br15  1  0.500  0.500  0.237  1.0
  Br  Br16  1  0.350  0.850  0.500  1.0
  Br  Br17  1  0.150  0.350  0.500  1.0
  Br  Br18  1  0.850  0.650  0.500  1.0
  Br  Br19  1  0.650  0.150  0.500  1.0
  O  O20  1  0.214  0.714  0.000  1.0
  O  O21  1  0.286  0.214  0.000  1.0
  O  O22  1  0.714  0.786  0.000  1.0
  O  O23  1  0.786  0.286  0.000  1.0
  O  O24  1  0.373  0.873  0.125  1.0
  O  O25  1  0.127  0.373  0.125  1.0
  O  O26  1  0.873  0.627  0.125  1.0
  O  O27  1  0.873  0.627  0.875  1.0
  O  O28  1  0.127  0.373  0.875  1.0
  O  O29  1  0.627  0.127  0.125  1.0
  O  O30  1  0.373  0.873  0.875  1.0
  O  O31  1  0.627  0.127  0.875  1.0
[/CIF]
.