The compound described by Pb3(PO4)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. P(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(4) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one P(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Pb(2) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_P2Pb3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.026
_cell_length_b   7.026
_cell_length_c   8.876
_cell_angle_alpha   72.305
_cell_angle_beta   72.305
_cell_angle_gamma   77.450
_symmetry_Int_Tables_number   1
_cell_volume   393.927
_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
  P  P0  1  0.086  0.490  0.199  1.0
  P  P1  1  0.510  0.914  0.301  1.0
  P  P2  1  0.914  0.510  0.801  1.0
  P  P3  1  0.490  0.086  0.699  1.0
  Pb  Pb4  1  0.585  0.415  0.250  1.0
  Pb  Pb5  1  0.415  0.585  0.750  1.0
  Pb  Pb6  1  0.100  0.193  0.562  1.0
  Pb  Pb7  1  0.807  0.900  0.938  1.0
  Pb  Pb8  1  0.900  0.807  0.438  1.0
  Pb  Pb9  1  0.193  0.100  0.062  1.0
  O  O10  1  0.261  0.424  0.062  1.0
  O  O11  1  0.576  0.739  0.438  1.0
  O  O12  1  0.739  0.576  0.938  1.0
  O  O13  1  0.424  0.261  0.562  1.0
  O  O14  1  0.515  0.829  0.157  1.0
  O  O15  1  0.171  0.485  0.343  1.0
  O  O16  1  0.485  0.171  0.843  1.0
  O  O17  1  0.829  0.515  0.657  1.0
  O  O18  1  0.983  0.704  0.143  1.0
  O  O19  1  0.296  0.017  0.357  1.0
  O  O20  1  0.017  0.296  0.857  1.0
  O  O21  1  0.704  0.983  0.643  1.0
  O  O22  1  0.667  0.063  0.238  1.0
  O  O23  1  0.937  0.333  0.262  1.0
  O  O24  1  0.333  0.937  0.762  1.0
  O  O25  1  0.063  0.667  0.738  1.0
[/CIF]
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The compound described by Pb3(PO4)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms. P(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(4) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one P(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Pb(2) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_P2Pb3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.026
_cell_length_b   7.026
_cell_length_c   8.876
_cell_angle_alpha   72.305
_cell_angle_beta   72.305
_cell_angle_gamma   77.450
_symmetry_Int_Tables_number   1
_cell_volume   393.927
_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
  P  P0  1  0.086  0.490  0.199  1.0
  P  P1  1  0.510  0.914  0.301  1.0
  P  P2  1  0.914  0.510  0.801  1.0
  P  P3  1  0.490  0.086  0.699  1.0
  Pb  Pb4  1  0.585  0.415  0.250  1.0
  Pb  Pb5  1  0.415  0.585  0.750  1.0
  Pb  Pb6  1  0.100  0.193  0.562  1.0
  Pb  Pb7  1  0.807  0.900  0.938  1.0
  Pb  Pb8  1  0.900  0.807  0.438  1.0
  Pb  Pb9  1  0.193  0.100  0.062  1.0
  O  O10  1  0.261  0.424  0.062  1.0
  O  O11  1  0.576  0.739  0.438  1.0
  O  O12  1  0.739  0.576  0.938  1.0
  O  O13  1  0.424  0.261  0.562  1.0
  O  O14  1  0.515  0.829  0.157  1.0
  O  O15  1  0.171  0.485  0.343  1.0
  O  O16  1  0.485  0.171  0.843  1.0
  O  O17  1  0.829  0.515  0.657  1.0
  O  O18  1  0.983  0.704  0.143  1.0
  O  O19  1  0.296  0.017  0.357  1.0
  O  O20  1  0.017  0.296  0.857  1.0
  O  O21  1  0.704  0.983  0.643  1.0
  O  O22  1  0.667  0.063  0.238  1.0
  O  O23  1  0.937  0.333  0.262  1.0
  O  O24  1  0.333  0.937  0.762  1.0
  O  O25  1  0.063  0.667  0.738  1.0
[/CIF]
.