The material structure described by Pb2As2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(5), and two equivalent O(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second As site, As(2) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Pb(1), one Pb(2), and one As(2) atom. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(1) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(3) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the fifth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_As2Pb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.716
_cell_length_b   8.586
_cell_length_c   13.679
_cell_angle_alpha   70.990
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   634.666
_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
  As  As0  1  0.869  0.387  0.937  1.0
  As  As1  1  0.369  0.613  0.563  1.0
  As  As2  1  0.131  0.613  0.063  1.0
  As  As3  1  0.631  0.387  0.437  1.0
  As  As4  1  0.128  0.117  0.129  1.0
  As  As5  1  0.628  0.883  0.371  1.0
  As  As6  1  0.872  0.883  0.871  1.0
  As  As7  1  0.372  0.117  0.629  1.0
  Pb  Pb8  1  0.344  0.142  0.880  1.0
  Pb  Pb9  1  0.844  0.858  0.620  1.0
  Pb  Pb10  1  0.656  0.858  0.120  1.0
  Pb  Pb11  1  0.156  0.142  0.380  1.0
  Pb  Pb12  1  0.657  0.350  0.201  1.0
  Pb  Pb13  1  0.157  0.650  0.299  1.0
  Pb  Pb14  1  0.343  0.650  0.799  1.0
  Pb  Pb15  1  0.843  0.350  0.701  1.0
  O  O16  1  0.664  0.348  0.852  1.0
  O  O17  1  0.164  0.652  0.648  1.0
  O  O18  1  0.336  0.652  0.148  1.0
  O  O19  1  0.836  0.348  0.352  1.0
  O  O20  1  0.120  0.379  0.862  1.0
  O  O21  1  0.620  0.621  0.638  1.0
  O  O22  1  0.880  0.621  0.138  1.0
  O  O23  1  0.380  0.379  0.362  1.0
  O  O24  1  0.888  0.179  0.033  1.0
  O  O25  1  0.388  0.821  0.467  1.0
  O  O26  1  0.112  0.821  0.967  1.0
  O  O27  1  0.612  0.179  0.533  1.0
  O  O28  1  0.049  0.240  0.206  1.0
  O  O29  1  0.549  0.760  0.294  1.0
  O  O30  1  0.951  0.760  0.794  1.0
  O  O31  1  0.451  0.240  0.706  1.0
  O  O32  1  0.999  0.930  0.200  1.0
  O  O33  1  0.499  0.070  0.300  1.0
  O  O34  1  0.001  0.070  0.800  1.0
  O  O35  1  0.501  0.930  0.700  1.0
[/CIF]
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The material structure described by Pb2As2O5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(5), and two equivalent O(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second As site, As(2) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Pb(1), one Pb(2), and one As(2) atom. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(1) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(3) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the fifth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_As2Pb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.716
_cell_length_b   8.586
_cell_length_c   13.679
_cell_angle_alpha   70.990
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   634.666
_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
  As  As0  1  0.869  0.387  0.937  1.0
  As  As1  1  0.369  0.613  0.563  1.0
  As  As2  1  0.131  0.613  0.063  1.0
  As  As3  1  0.631  0.387  0.437  1.0
  As  As4  1  0.128  0.117  0.129  1.0
  As  As5  1  0.628  0.883  0.371  1.0
  As  As6  1  0.872  0.883  0.871  1.0
  As  As7  1  0.372  0.117  0.629  1.0
  Pb  Pb8  1  0.344  0.142  0.880  1.0
  Pb  Pb9  1  0.844  0.858  0.620  1.0
  Pb  Pb10  1  0.656  0.858  0.120  1.0
  Pb  Pb11  1  0.156  0.142  0.380  1.0
  Pb  Pb12  1  0.657  0.350  0.201  1.0
  Pb  Pb13  1  0.157  0.650  0.299  1.0
  Pb  Pb14  1  0.343  0.650  0.799  1.0
  Pb  Pb15  1  0.843  0.350  0.701  1.0
  O  O16  1  0.664  0.348  0.852  1.0
  O  O17  1  0.164  0.652  0.648  1.0
  O  O18  1  0.336  0.652  0.148  1.0
  O  O19  1  0.836  0.348  0.352  1.0
  O  O20  1  0.120  0.379  0.862  1.0
  O  O21  1  0.620  0.621  0.638  1.0
  O  O22  1  0.880  0.621  0.138  1.0
  O  O23  1  0.380  0.379  0.362  1.0
  O  O24  1  0.888  0.179  0.033  1.0
  O  O25  1  0.388  0.821  0.467  1.0
  O  O26  1  0.112  0.821  0.967  1.0
  O  O27  1  0.612  0.179  0.533  1.0
  O  O28  1  0.049  0.240  0.206  1.0
  O  O29  1  0.549  0.760  0.294  1.0
  O  O30  1  0.951  0.760  0.794  1.0
  O  O31  1  0.451  0.240  0.706  1.0
  O  O32  1  0.999  0.930  0.200  1.0
  O  O33  1  0.499  0.070  0.300  1.0
  O  O34  1  0.001  0.070  0.800  1.0
  O  O35  1  0.501  0.930  0.700  1.0
[/CIF]
.