The crystal structure described by Pb3(AsO4)2 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 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Pb site, Pb(2) is bonded in a distorted pentagonal planar geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one As(1) atom. In the second O site, O(2) 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(3) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Pb(1), one Pb(2), and one As(1) atom. is represented by the CIF file [CIF]
data_As2Pb3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.217
_cell_length_b   7.505
_cell_length_c   9.424
_cell_angle_alpha   65.436
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.922
_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
  As  As0  1  0.020  0.796  0.403  1.0
  As  As1  1  0.520  0.204  0.097  1.0
  As  As2  1  0.980  0.204  0.597  1.0
  As  As3  1  0.480  0.796  0.903  1.0
  Pb  Pb4  1  0.000  0.000  0.000  1.0
  Pb  Pb5  1  0.500  0.000  0.500  1.0
  Pb  Pb6  1  0.912  0.621  0.789  1.0
  Pb  Pb7  1  0.412  0.379  0.711  1.0
  Pb  Pb8  1  0.088  0.379  0.211  1.0
  Pb  Pb9  1  0.588  0.621  0.289  1.0
  O  O10  1  0.241  0.718  0.517  1.0
  O  O11  1  0.741  0.282  0.983  1.0
  O  O12  1  0.759  0.282  0.483  1.0
  O  O13  1  0.259  0.718  0.017  1.0
  O  O14  1  0.701  0.745  0.023  1.0
  O  O15  1  0.201  0.255  0.477  1.0
  O  O16  1  0.299  0.255  0.977  1.0
  O  O17  1  0.799  0.745  0.523  1.0
  O  O18  1  0.029  0.322  0.716  1.0
  O  O19  1  0.529  0.678  0.784  1.0
  O  O20  1  0.971  0.678  0.284  1.0
  O  O21  1  0.471  0.322  0.216  1.0
  O  O22  1  0.039  0.035  0.279  1.0
  O  O23  1  0.539  0.965  0.221  1.0
  O  O24  1  0.961  0.965  0.721  1.0
  O  O25  1  0.461  0.035  0.779  1.0
[/CIF]
.
The crystal structure described by Pb3(AsO4)2 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 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Pb site, Pb(2) is bonded in a distorted pentagonal planar geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one As(1) atom. In the second O site, O(2) 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(3) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Pb(1), one Pb(2), and one As(1) atom. is represented by the CIF file [CIF]
data_As2Pb3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.217
_cell_length_b   7.505
_cell_length_c   9.424
_cell_angle_alpha   65.436
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.922
_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
  As  As0  1  0.020  0.796  0.403  1.0
  As  As1  1  0.520  0.204  0.097  1.0
  As  As2  1  0.980  0.204  0.597  1.0
  As  As3  1  0.480  0.796  0.903  1.0
  Pb  Pb4  1  0.000  0.000  0.000  1.0
  Pb  Pb5  1  0.500  0.000  0.500  1.0
  Pb  Pb6  1  0.912  0.621  0.789  1.0
  Pb  Pb7  1  0.412  0.379  0.711  1.0
  Pb  Pb8  1  0.088  0.379  0.211  1.0
  Pb  Pb9  1  0.588  0.621  0.289  1.0
  O  O10  1  0.241  0.718  0.517  1.0
  O  O11  1  0.741  0.282  0.983  1.0
  O  O12  1  0.759  0.282  0.483  1.0
  O  O13  1  0.259  0.718  0.017  1.0
  O  O14  1  0.701  0.745  0.023  1.0
  O  O15  1  0.201  0.255  0.477  1.0
  O  O16  1  0.299  0.255  0.977  1.0
  O  O17  1  0.799  0.745  0.523  1.0
  O  O18  1  0.029  0.322  0.716  1.0
  O  O19  1  0.529  0.678  0.784  1.0
  O  O20  1  0.971  0.678  0.284  1.0
  O  O21  1  0.471  0.322  0.216  1.0
  O  O22  1  0.039  0.035  0.279  1.0
  O  O23  1  0.539  0.965  0.221  1.0
  O  O24  1  0.961  0.965  0.721  1.0
  O  O25  1  0.461  0.035  0.779  1.0
[/CIF]
.