The structure described by Pb2P2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), and two equivalent O(8) atoms. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the third Pb site, Pb(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(5), and one O(7) atom. In the fourth Pb site, Pb(4) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(14), one O(5), one O(8), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(12), one O(13), one O(14), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form corner-sharing PO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Pb(1), one Pb(3), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Pb(3), one Pb(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Pb(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Pb(4), two equivalent Pb(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Pb(4) and one P(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(4), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(4), and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Pb(1) and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Pb(4) and one P(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_P2Pb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.963
_cell_length_b   6.986
_cell_length_c   12.802
_cell_angle_alpha   96.867
_cell_angle_beta   89.317
_cell_angle_gamma   90.296
_symmetry_Int_Tables_number   1
_cell_volume   618.263
_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
  P  P0  1  0.421  0.708  0.899  1.0
  P  P1  1  0.579  0.292  0.101  1.0
  P  P2  1  0.168  0.699  0.085  1.0
  P  P3  1  0.832  0.301  0.915  1.0
  P  P4  1  0.817  0.698  0.590  1.0
  P  P5  1  0.183  0.302  0.410  1.0
  P  P6  1  0.768  0.895  0.402  1.0
  P  P7  1  0.232  0.105  0.598  1.0
  Pb  Pb8  1  0.350  0.625  0.633  1.0
  Pb  Pb9  1  0.650  0.375  0.367  1.0
  Pb  Pb10  1  0.909  0.811  0.854  1.0
  Pb  Pb11  1  0.091  0.189  0.146  1.0
  Pb  Pb12  1  0.324  0.211  0.859  1.0
  Pb  Pb13  1  0.676  0.789  0.141  1.0
  Pb  Pb14  1  0.752  0.204  0.650  1.0
  Pb  Pb15  1  0.248  0.796  0.350  1.0
  O  O16  1  0.471  0.542  0.817  1.0
  O  O17  1  0.529  0.458  0.183  1.0
  O  O18  1  0.596  0.799  0.956  1.0
  O  O19  1  0.404  0.201  0.044  1.0
  O  O20  1  0.292  0.855  0.856  1.0
  O  O21  1  0.708  0.145  0.144  1.0
  O  O22  1  0.294  0.607  0.985  1.0
  O  O23  1  0.706  0.393  0.015  1.0
  O  O24  1  0.304  0.832  0.153  1.0
  O  O25  1  0.696  0.168  0.847  1.0
  O  O26  1  0.089  0.534  0.138  1.0
  O  O27  1  0.911  0.466  0.862  1.0
  O  O28  1  0.008  0.818  0.043  1.0
  O  O29  1  0.992  0.182  0.957  1.0
  O  O30  1  0.684  0.529  0.551  1.0
  O  O31  1  0.316  0.471  0.449  1.0
  O  O32  1  0.089  0.080  0.685  1.0
  O  O33  1  0.911  0.920  0.315  1.0
  O  O34  1  0.394  0.241  0.638  1.0
  O  O35  1  0.606  0.759  0.362  1.0
  O  O36  1  0.301  0.918  0.538  1.0
  O  O37  1  0.699  0.082  0.462  1.0
  O  O38  1  0.110  0.213  0.514  1.0
  O  O39  1  0.890  0.787  0.486  1.0
  O  O40  1  0.009  0.367  0.356  1.0
  O  O41  1  0.991  0.633  0.644  1.0
  O  O42  1  0.299  0.147  0.343  1.0
  O  O43  1  0.701  0.853  0.657  1.0
[/CIF]
.
The structure described by Pb2P2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), and two equivalent O(8) atoms. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the third Pb site, Pb(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(5), and one O(7) atom. In the fourth Pb site, Pb(4) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(14), one O(5), one O(8), and one O(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(12), one O(13), one O(14), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form corner-sharing PO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Pb(1), one Pb(3), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Pb(3), one Pb(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Pb(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Pb(2), one Pb(3), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Pb(4), two equivalent Pb(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Pb(4) and one P(4) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(4), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(4), and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Pb(1) and one P(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Pb(4) and one P(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_P2Pb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.963
_cell_length_b   6.986
_cell_length_c   12.802
_cell_angle_alpha   96.867
_cell_angle_beta   89.317
_cell_angle_gamma   90.296
_symmetry_Int_Tables_number   1
_cell_volume   618.263
_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
  P  P0  1  0.421  0.708  0.899  1.0
  P  P1  1  0.579  0.292  0.101  1.0
  P  P2  1  0.168  0.699  0.085  1.0
  P  P3  1  0.832  0.301  0.915  1.0
  P  P4  1  0.817  0.698  0.590  1.0
  P  P5  1  0.183  0.302  0.410  1.0
  P  P6  1  0.768  0.895  0.402  1.0
  P  P7  1  0.232  0.105  0.598  1.0
  Pb  Pb8  1  0.350  0.625  0.633  1.0
  Pb  Pb9  1  0.650  0.375  0.367  1.0
  Pb  Pb10  1  0.909  0.811  0.854  1.0
  Pb  Pb11  1  0.091  0.189  0.146  1.0
  Pb  Pb12  1  0.324  0.211  0.859  1.0
  Pb  Pb13  1  0.676  0.789  0.141  1.0
  Pb  Pb14  1  0.752  0.204  0.650  1.0
  Pb  Pb15  1  0.248  0.796  0.350  1.0
  O  O16  1  0.471  0.542  0.817  1.0
  O  O17  1  0.529  0.458  0.183  1.0
  O  O18  1  0.596  0.799  0.956  1.0
  O  O19  1  0.404  0.201  0.044  1.0
  O  O20  1  0.292  0.855  0.856  1.0
  O  O21  1  0.708  0.145  0.144  1.0
  O  O22  1  0.294  0.607  0.985  1.0
  O  O23  1  0.706  0.393  0.015  1.0
  O  O24  1  0.304  0.832  0.153  1.0
  O  O25  1  0.696  0.168  0.847  1.0
  O  O26  1  0.089  0.534  0.138  1.0
  O  O27  1  0.911  0.466  0.862  1.0
  O  O28  1  0.008  0.818  0.043  1.0
  O  O29  1  0.992  0.182  0.957  1.0
  O  O30  1  0.684  0.529  0.551  1.0
  O  O31  1  0.316  0.471  0.449  1.0
  O  O32  1  0.089  0.080  0.685  1.0
  O  O33  1  0.911  0.920  0.315  1.0
  O  O34  1  0.394  0.241  0.638  1.0
  O  O35  1  0.606  0.759  0.362  1.0
  O  O36  1  0.301  0.918  0.538  1.0
  O  O37  1  0.699  0.082  0.462  1.0
  O  O38  1  0.110  0.213  0.514  1.0
  O  O39  1  0.890  0.787  0.486  1.0
  O  O40  1  0.009  0.367  0.356  1.0
  O  O41  1  0.991  0.633  0.644  1.0
  O  O42  1  0.299  0.147  0.343  1.0
  O  O43  1  0.701  0.853  0.657  1.0
[/CIF]
.