The structure described by Pb7(O4Br)2 crystallizes in the monoclinic P2_1 space group. There are seven inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(8), and one Br(2) atom. In the second Pb site, Pb(2) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(2), one O(3), one O(4), and one Br(2) atom. In the third Pb site, Pb(3) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(6) atom. In the fourth Pb site, Pb(4) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. In the fifth Pb site, Pb(5) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one Br(1) atom. In the sixth Pb site, Pb(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one Br(1) atom. In the seventh Pb site, Pb(7) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to one Pb(1), one Pb(5), one Pb(6), and one Pb(7) atom. In the second O site, O(1) is bonded to one Pb(1), one Pb(2), one Pb(5), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the third O site, O(2) is bonded to one Pb(1), one Pb(2), one Pb(5), and one Pb(6) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the fourth O site, O(3) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(4) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the fifth O site, O(4) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(4) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the sixth O site, O(5) is bonded in a water-like geometry to one Pb(4) and one Pb(7) atom. In the seventh O site, O(6) is bonded in a water-like geometry to one Pb(3) and one Pb(7) atom. In the eighth O site, O(7) is bonded in a distorted T-shaped geometry to one Pb(5), one Pb(6), and one Pb(7) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to one Pb(5) and one Pb(6) atom. In the second Br site, Br(2) is bonded in a distorted water-like geometry to one Pb(1) and one Pb(2) atom. is represented by the CIF file [CIF]
data_Pb7(BrO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.994
_cell_length_b   7.331
_cell_length_c   20.019
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.659
_symmetry_Int_Tables_number   1
_cell_volume   799.398
_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
  Pb  Pb0  1  0.361  0.450  0.032  1.0
  Pb  Pb1  1  0.639  0.550  0.532  1.0
  Pb  Pb2  1  0.701  0.147  0.998  1.0
  Pb  Pb3  1  0.299  0.853  0.498  1.0
  Pb  Pb4  1  0.182  0.123  0.871  1.0
  Pb  Pb5  1  0.818  0.877  0.371  1.0
  Pb  Pb6  1  0.868  0.477  0.863  1.0
  Pb  Pb7  1  0.132  0.523  0.363  1.0
  Pb  Pb8  1  0.821  0.343  0.163  1.0
  Pb  Pb9  1  0.179  0.657  0.663  1.0
  Pb  Pb10  1  0.137  0.050  0.157  1.0
  Pb  Pb11  1  0.863  0.950  0.657  1.0
  Pb  Pb12  1  0.482  0.714  0.225  1.0
  Pb  Pb13  1  0.518  0.286  0.725  1.0
  Br  Br14  1  0.976  0.711  0.058  1.0
  Br  Br15  1  0.024  0.289  0.558  1.0
  Br  Br16  1  0.531  0.817  0.920  1.0
  Br  Br17  1  0.469  0.183  0.420  1.0
  O  O18  1  0.977  0.203  0.076  1.0
  O  O19  1  0.023  0.797  0.576  1.0
  O  O20  1  0.503  0.208  0.078  1.0
  O  O21  1  0.497  0.792  0.578  1.0
  O  O22  1  0.537  0.301  0.936  1.0
  O  O23  1  0.463  0.699  0.436  1.0
  O  O24  1  0.022  0.305  0.935  1.0
  O  O25  1  0.978  0.695  0.435  1.0
  O  O26  1  0.228  0.765  0.285  1.0
  O  O27  1  0.772  0.235  0.785  1.0
  O  O28  1  0.645  0.617  0.303  1.0
  O  O29  1  0.355  0.383  0.803  1.0
  O  O30  1  0.747  0.003  0.197  1.0
  O  O31  1  0.253  0.997  0.697  1.0
  O  O32  1  0.290  0.460  0.164  1.0
  O  O33  1  0.710  0.540  0.664  1.0
[/CIF]
.
The structure described by Pb7(O4Br)2 crystallizes in the monoclinic P2_1 space group. There are seven inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(8), and one Br(2) atom. In the second Pb site, Pb(2) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(2), one O(3), one O(4), and one Br(2) atom. In the third Pb site, Pb(3) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(6) atom. In the fourth Pb site, Pb(4) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. In the fifth Pb site, Pb(5) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one Br(1) atom. In the sixth Pb site, Pb(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one Br(1) atom. In the seventh Pb site, Pb(7) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to one Pb(1), one Pb(5), one Pb(6), and one Pb(7) atom. In the second O site, O(1) is bonded to one Pb(1), one Pb(2), one Pb(5), and one Pb(6) atom to form a mixture of edge and corner-sharing OPb4 tetrahedra. In the third O site, O(2) is bonded to one Pb(1), one Pb(2), one Pb(5), and one Pb(6) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the fourth O site, O(3) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(4) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the fifth O site, O(4) is bonded to one Pb(1), one Pb(2), one Pb(3), and one Pb(4) atom to form a mixture of distorted edge and corner-sharing OPb4 tetrahedra. In the sixth O site, O(5) is bonded in a water-like geometry to one Pb(4) and one Pb(7) atom. In the seventh O site, O(6) is bonded in a water-like geometry to one Pb(3) and one Pb(7) atom. In the eighth O site, O(7) is bonded in a distorted T-shaped geometry to one Pb(5), one Pb(6), and one Pb(7) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 2-coordinate geometry to one Pb(5) and one Pb(6) atom. In the second Br site, Br(2) is bonded in a distorted water-like geometry to one Pb(1) and one Pb(2) atom. is represented by the CIF file [CIF]
data_Pb7(BrO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.994
_cell_length_b   7.331
_cell_length_c   20.019
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   114.659
_symmetry_Int_Tables_number   1
_cell_volume   799.398
_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
  Pb  Pb0  1  0.361  0.450  0.032  1.0
  Pb  Pb1  1  0.639  0.550  0.532  1.0
  Pb  Pb2  1  0.701  0.147  0.998  1.0
  Pb  Pb3  1  0.299  0.853  0.498  1.0
  Pb  Pb4  1  0.182  0.123  0.871  1.0
  Pb  Pb5  1  0.818  0.877  0.371  1.0
  Pb  Pb6  1  0.868  0.477  0.863  1.0
  Pb  Pb7  1  0.132  0.523  0.363  1.0
  Pb  Pb8  1  0.821  0.343  0.163  1.0
  Pb  Pb9  1  0.179  0.657  0.663  1.0
  Pb  Pb10  1  0.137  0.050  0.157  1.0
  Pb  Pb11  1  0.863  0.950  0.657  1.0
  Pb  Pb12  1  0.482  0.714  0.225  1.0
  Pb  Pb13  1  0.518  0.286  0.725  1.0
  Br  Br14  1  0.976  0.711  0.058  1.0
  Br  Br15  1  0.024  0.289  0.558  1.0
  Br  Br16  1  0.531  0.817  0.920  1.0
  Br  Br17  1  0.469  0.183  0.420  1.0
  O  O18  1  0.977  0.203  0.076  1.0
  O  O19  1  0.023  0.797  0.576  1.0
  O  O20  1  0.503  0.208  0.078  1.0
  O  O21  1  0.497  0.792  0.578  1.0
  O  O22  1  0.537  0.301  0.936  1.0
  O  O23  1  0.463  0.699  0.436  1.0
  O  O24  1  0.022  0.305  0.935  1.0
  O  O25  1  0.978  0.695  0.435  1.0
  O  O26  1  0.228  0.765  0.285  1.0
  O  O27  1  0.772  0.235  0.785  1.0
  O  O28  1  0.645  0.617  0.303  1.0
  O  O29  1  0.355  0.383  0.803  1.0
  O  O30  1  0.747  0.003  0.197  1.0
  O  O31  1  0.253  0.997  0.697  1.0
  O  O32  1  0.290  0.460  0.164  1.0
  O  O33  1  0.710  0.540  0.664  1.0
[/CIF]
.