The structure described by Fe2Pb(P2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Pb(1)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 67°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Pb(1)O6 octahedra. Pb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted PbO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are two 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(7) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Pb(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-61°. 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 PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Pb(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-68°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Fe(2), one Pb(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Fe(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Fe(2), one Pb(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Fe2P4PbO14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.800
_cell_length_b   7.140
_cell_length_c   7.856
_cell_angle_alpha   89.612
_cell_angle_beta   92.199
_cell_angle_gamma   107.119
_symmetry_Int_Tables_number   1
_cell_volume   257.131
_cell_formula_units_Z   1
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  0.000  0.000  0.500  1.0
  Fe  Fe1  1  0.500  0.500  0.000  1.0
  P  P2  1  0.383  0.770  0.298  1.0
  P  P3  1  0.617  0.230  0.702  1.0
  P  P4  1  0.962  0.380  0.247  1.0
  P  P5  1  0.038  0.620  0.753  1.0
  Pb  Pb6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.488  0.757  0.117  1.0
  O  O8  1  0.512  0.243  0.883  1.0
  O  O9  1  0.185  0.903  0.293  1.0
  O  O10  1  0.815  0.097  0.707  1.0
  O  O11  1  0.622  0.819  0.433  1.0
  O  O12  1  0.315  0.567  0.791  1.0
  O  O13  1  0.685  0.433  0.209  1.0
  O  O14  1  0.888  0.645  0.917  1.0
  O  O15  1  0.112  0.355  0.083  1.0
  O  O16  1  0.090  0.803  0.650  1.0
  O  O17  1  0.910  0.197  0.350  1.0
  O  O18  1  0.814  0.445  0.651  1.0
  O  O19  1  0.186  0.555  0.349  1.0
  O  O20  1  0.378  0.181  0.567  1.0
[/CIF]
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The structure described by Fe2Pb(P2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Pb(1)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 67°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Pb(1)O6 octahedra. Pb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form distorted PbO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are two 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(7) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Pb(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-61°. 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 PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Pb(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-68°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Fe(2), one Pb(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Fe(1), one Pb(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Fe(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Fe(2), one Pb(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Fe2P4PbO14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.800
_cell_length_b   7.140
_cell_length_c   7.856
_cell_angle_alpha   89.612
_cell_angle_beta   92.199
_cell_angle_gamma   107.119
_symmetry_Int_Tables_number   1
_cell_volume   257.131
_cell_formula_units_Z   1
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  0.000  0.000  0.500  1.0
  Fe  Fe1  1  0.500  0.500  0.000  1.0
  P  P2  1  0.383  0.770  0.298  1.0
  P  P3  1  0.617  0.230  0.702  1.0
  P  P4  1  0.962  0.380  0.247  1.0
  P  P5  1  0.038  0.620  0.753  1.0
  Pb  Pb6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.488  0.757  0.117  1.0
  O  O8  1  0.512  0.243  0.883  1.0
  O  O9  1  0.185  0.903  0.293  1.0
  O  O10  1  0.815  0.097  0.707  1.0
  O  O11  1  0.622  0.819  0.433  1.0
  O  O12  1  0.315  0.567  0.791  1.0
  O  O13  1  0.685  0.433  0.209  1.0
  O  O14  1  0.888  0.645  0.917  1.0
  O  O15  1  0.112  0.355  0.083  1.0
  O  O16  1  0.090  0.803  0.650  1.0
  O  O17  1  0.910  0.197  0.350  1.0
  O  O18  1  0.814  0.445  0.651  1.0
  O  O19  1  0.186  0.555  0.349  1.0
  O  O20  1  0.378  0.181  0.567  1.0
[/CIF]
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