The crystal structure described by Fe2Pb3(PO4)4 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 4-coordinate geometry to one O(3), one O(5), one O(6), and one O(8) atom. In the second Pb site, Pb(2) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-45°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-44°. There are eight inequivalent O sites. In the first O site, O(8) 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 bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(2), and one P(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(2), and one P(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(2) atom. In the eighth O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2P4Pb3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.194
_cell_length_b   9.135
_cell_length_c   9.468
_cell_angle_alpha   63.029
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   708.681
_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
  Fe  Fe0  1  0.367  0.754  0.242  1.0
  Fe  Fe1  1  0.867  0.246  0.258  1.0
  Fe  Fe2  1  0.633  0.246  0.758  1.0
  Fe  Fe3  1  0.133  0.754  0.742  1.0
  P  P4  1  0.089  0.574  0.139  1.0
  P  P5  1  0.639  0.020  0.156  1.0
  P  P6  1  0.361  0.980  0.844  1.0
  P  P7  1  0.411  0.574  0.639  1.0
  P  P8  1  0.911  0.426  0.861  1.0
  P  P9  1  0.589  0.426  0.361  1.0
  P  P10  1  0.861  0.020  0.656  1.0
  P  P11  1  0.139  0.980  0.344  1.0
  Pb  Pb12  1  0.207  0.302  0.468  1.0
  Pb  Pb13  1  0.707  0.698  0.032  1.0
  Pb  Pb14  1  0.793  0.698  0.532  1.0
  Pb  Pb15  1  0.000  0.000  0.000  1.0
  Pb  Pb16  1  0.293  0.302  0.968  1.0
  Pb  Pb17  1  0.500  0.000  0.500  1.0
  O  O18  1  0.908  0.162  0.494  1.0
  O  O19  1  0.794  0.089  0.765  1.0
  O  O20  1  0.952  0.612  0.760  1.0
  O  O21  1  0.706  0.089  0.265  1.0
  O  O22  1  0.496  0.078  0.748  1.0
  O  O23  1  0.548  0.612  0.260  1.0
  O  O24  1  0.592  0.162  0.994  1.0
  O  O25  1  0.004  0.078  0.248  1.0
  O  O26  1  0.714  0.406  0.259  1.0
  O  O27  1  0.452  0.388  0.740  1.0
  O  O28  1  0.248  0.095  0.369  1.0
  O  O29  1  0.408  0.838  0.006  1.0
  O  O30  1  0.850  0.393  0.024  1.0
  O  O31  1  0.092  0.838  0.506  1.0
  O  O32  1  0.504  0.922  0.252  1.0
  O  O33  1  0.350  0.607  0.476  1.0
  O  O34  1  0.650  0.393  0.524  1.0
  O  O35  1  0.752  0.905  0.631  1.0
  O  O36  1  0.957  0.685  0.126  1.0
  O  O37  1  0.286  0.594  0.741  1.0
  O  O38  1  0.252  0.095  0.869  1.0
  O  O39  1  0.786  0.406  0.759  1.0
  O  O40  1  0.294  0.911  0.735  1.0
  O  O41  1  0.748  0.905  0.131  1.0
  O  O42  1  0.214  0.594  0.241  1.0
  O  O43  1  0.150  0.607  0.976  1.0
  O  O44  1  0.457  0.315  0.374  1.0
  O  O45  1  0.043  0.315  0.874  1.0
  O  O46  1  0.048  0.388  0.240  1.0
  O  O47  1  0.206  0.911  0.235  1.0
  O  O48  1  0.543  0.685  0.626  1.0
  O  O49  1  0.996  0.922  0.752  1.0
[/CIF]
.
The crystal structure described by Fe2Pb3(PO4)4 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 4-coordinate geometry to one O(3), one O(5), one O(6), and one O(8) atom. In the second Pb site, Pb(2) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-45°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-44°. There are eight inequivalent O sites. In the first O site, O(8) 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 bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(2), and one P(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(2), and one P(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one P(2) atom. In the eighth O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2P4Pb3O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.194
_cell_length_b   9.135
_cell_length_c   9.468
_cell_angle_alpha   63.029
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   708.681
_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
  Fe  Fe0  1  0.367  0.754  0.242  1.0
  Fe  Fe1  1  0.867  0.246  0.258  1.0
  Fe  Fe2  1  0.633  0.246  0.758  1.0
  Fe  Fe3  1  0.133  0.754  0.742  1.0
  P  P4  1  0.089  0.574  0.139  1.0
  P  P5  1  0.639  0.020  0.156  1.0
  P  P6  1  0.361  0.980  0.844  1.0
  P  P7  1  0.411  0.574  0.639  1.0
  P  P8  1  0.911  0.426  0.861  1.0
  P  P9  1  0.589  0.426  0.361  1.0
  P  P10  1  0.861  0.020  0.656  1.0
  P  P11  1  0.139  0.980  0.344  1.0
  Pb  Pb12  1  0.207  0.302  0.468  1.0
  Pb  Pb13  1  0.707  0.698  0.032  1.0
  Pb  Pb14  1  0.793  0.698  0.532  1.0
  Pb  Pb15  1  0.000  0.000  0.000  1.0
  Pb  Pb16  1  0.293  0.302  0.968  1.0
  Pb  Pb17  1  0.500  0.000  0.500  1.0
  O  O18  1  0.908  0.162  0.494  1.0
  O  O19  1  0.794  0.089  0.765  1.0
  O  O20  1  0.952  0.612  0.760  1.0
  O  O21  1  0.706  0.089  0.265  1.0
  O  O22  1  0.496  0.078  0.748  1.0
  O  O23  1  0.548  0.612  0.260  1.0
  O  O24  1  0.592  0.162  0.994  1.0
  O  O25  1  0.004  0.078  0.248  1.0
  O  O26  1  0.714  0.406  0.259  1.0
  O  O27  1  0.452  0.388  0.740  1.0
  O  O28  1  0.248  0.095  0.369  1.0
  O  O29  1  0.408  0.838  0.006  1.0
  O  O30  1  0.850  0.393  0.024  1.0
  O  O31  1  0.092  0.838  0.506  1.0
  O  O32  1  0.504  0.922  0.252  1.0
  O  O33  1  0.350  0.607  0.476  1.0
  O  O34  1  0.650  0.393  0.524  1.0
  O  O35  1  0.752  0.905  0.631  1.0
  O  O36  1  0.957  0.685  0.126  1.0
  O  O37  1  0.286  0.594  0.741  1.0
  O  O38  1  0.252  0.095  0.869  1.0
  O  O39  1  0.786  0.406  0.759  1.0
  O  O40  1  0.294  0.911  0.735  1.0
  O  O41  1  0.748  0.905  0.131  1.0
  O  O42  1  0.214  0.594  0.241  1.0
  O  O43  1  0.150  0.607  0.976  1.0
  O  O44  1  0.457  0.315  0.374  1.0
  O  O45  1  0.043  0.315  0.874  1.0
  O  O46  1  0.048  0.388  0.240  1.0
  O  O47  1  0.206  0.911  0.235  1.0
  O  O48  1  0.543  0.685  0.626  1.0
  O  O49  1  0.996  0.922  0.752  1.0
[/CIF]
.