The crystal structure described by BaFe2PbO5 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded to one O(1), two equivalent O(2), two equivalent O(3), three equivalent O(5), and four equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid, faces with four equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Fe(1)O6 octahedra, and faces with two equivalent Fe(2)O5 trigonal bipyramids. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the second Fe site, Fe(2) is bonded to one O(2), one O(3), and three equivalent O(1) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Ba(1)O12 cuboctahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, edges with two equivalent Fe(2)O5 trigonal bipyramids, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-13°. Pb(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(5) is bonded to three equivalent Ba(1), two equivalent Fe(1), and one Pb(1) atom to form distorted OBa3Fe2Pb octahedra that share corners with four equivalent O(5)Ba3Fe2Pb octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with two equivalent O(5)Ba3Fe2Pb octahedra, and faces with four equivalent O(4)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-58°. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one Ba(1), three equivalent Fe(2), and one Pb(1) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Fe(1), one Fe(2), and two equivalent Pb(1) atoms. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Fe(1), one Fe(2), and two equivalent Pb(1) atoms. In the fifth O site, O(4) is bonded to four equivalent Ba(1) and two equivalent Fe(1) atoms to form distorted OBa4Fe2 octahedra that share corners with four equivalent O(5)Ba3Fe2Pb octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with two equivalent O(4)Ba4Fe2 octahedra, faces with two equivalent O(4)Ba4Fe2 octahedra, and faces with four equivalent O(5)Ba3Fe2Pb octahedra. The corner-sharing octahedral tilt angles range from 57-59°. is represented by the CIF file [CIF]
data_BaFe2PbO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.026
_cell_length_b   5.857
_cell_length_c   21.607
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   509.545
_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
  Ba  Ba0  1  0.250  0.520  0.185  1.0
  Ba  Ba1  1  0.750  0.480  0.815  1.0
  Ba  Ba2  1  0.750  0.980  0.685  1.0
  Ba  Ba3  1  0.250  0.020  0.315  1.0
  Fe  Fe4  1  0.250  0.978  0.813  1.0
  Fe  Fe5  1  0.750  0.022  0.187  1.0
  Fe  Fe6  1  0.750  0.522  0.313  1.0
  Fe  Fe7  1  0.250  0.478  0.687  1.0
  Fe  Fe8  1  0.250  0.981  0.553  1.0
  Fe  Fe9  1  0.750  0.019  0.447  1.0
  Fe  Fe10  1  0.750  0.519  0.053  1.0
  Fe  Fe11  1  0.250  0.481  0.947  1.0
  Pb  Pb12  1  0.250  0.011  0.071  1.0
  Pb  Pb13  1  0.750  0.989  0.929  1.0
  Pb  Pb14  1  0.750  0.489  0.571  1.0
  Pb  Pb15  1  0.250  0.511  0.429  1.0
  O  O16  1  0.250  0.559  0.037  1.0
  O  O17  1  0.750  0.441  0.963  1.0
  O  O18  1  0.750  0.941  0.537  1.0
  O  O19  1  0.250  0.059  0.463  1.0
  O  O20  1  0.250  0.714  0.609  1.0
  O  O21  1  0.750  0.286  0.391  1.0
  O  O22  1  0.750  0.786  0.109  1.0
  O  O23  1  0.250  0.214  0.891  1.0
  O  O24  1  0.250  0.733  0.891  1.0
  O  O25  1  0.750  0.267  0.109  1.0
  O  O26  1  0.750  0.767  0.391  1.0
  O  O27  1  0.250  0.233  0.609  1.0
  O  O28  1  0.250  0.728  0.750  1.0
  O  O29  1  0.750  0.272  0.250  1.0
  O  O30  1  0.750  0.772  0.250  1.0
  O  O31  1  0.250  0.228  0.750  1.0
  O  O32  1  0.250  0.520  0.323  1.0
  O  O33  1  0.750  0.480  0.677  1.0
  O  O34  1  0.750  0.980  0.823  1.0
  O  O35  1  0.250  0.020  0.177  1.0
[/CIF]
.
The crystal structure described by BaFe2PbO5 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded to one O(1), two equivalent O(2), two equivalent O(3), three equivalent O(5), and four equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra,  a cornercorner with one Fe(2)O5 trigonal bipyramid, faces with four equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Fe(1)O6 octahedra, and faces with two equivalent Fe(2)O5 trigonal bipyramids. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-12°. In the second Fe site, Fe(2) is bonded to one O(2), one O(3), and three equivalent O(1) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Ba(1)O12 cuboctahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, edges with two equivalent Fe(2)O5 trigonal bipyramids, and faces with two equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-13°. Pb(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(5) is bonded to three equivalent Ba(1), two equivalent Fe(1), and one Pb(1) atom to form distorted OBa3Fe2Pb octahedra that share corners with four equivalent O(5)Ba3Fe2Pb octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with two equivalent O(5)Ba3Fe2Pb octahedra, and faces with four equivalent O(4)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-58°. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one Ba(1), three equivalent Fe(2), and one Pb(1) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Fe(1), one Fe(2), and two equivalent Pb(1) atoms. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), one Fe(1), one Fe(2), and two equivalent Pb(1) atoms. In the fifth O site, O(4) is bonded to four equivalent Ba(1) and two equivalent Fe(1) atoms to form distorted OBa4Fe2 octahedra that share corners with four equivalent O(5)Ba3Fe2Pb octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with two equivalent O(4)Ba4Fe2 octahedra, faces with two equivalent O(4)Ba4Fe2 octahedra, and faces with four equivalent O(5)Ba3Fe2Pb octahedra. The corner-sharing octahedral tilt angles range from 57-59°. is represented by the CIF file [CIF]
data_BaFe2PbO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.026
_cell_length_b   5.857
_cell_length_c   21.607
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   509.545
_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
  Ba  Ba0  1  0.250  0.520  0.185  1.0
  Ba  Ba1  1  0.750  0.480  0.815  1.0
  Ba  Ba2  1  0.750  0.980  0.685  1.0
  Ba  Ba3  1  0.250  0.020  0.315  1.0
  Fe  Fe4  1  0.250  0.978  0.813  1.0
  Fe  Fe5  1  0.750  0.022  0.187  1.0
  Fe  Fe6  1  0.750  0.522  0.313  1.0
  Fe  Fe7  1  0.250  0.478  0.687  1.0
  Fe  Fe8  1  0.250  0.981  0.553  1.0
  Fe  Fe9  1  0.750  0.019  0.447  1.0
  Fe  Fe10  1  0.750  0.519  0.053  1.0
  Fe  Fe11  1  0.250  0.481  0.947  1.0
  Pb  Pb12  1  0.250  0.011  0.071  1.0
  Pb  Pb13  1  0.750  0.989  0.929  1.0
  Pb  Pb14  1  0.750  0.489  0.571  1.0
  Pb  Pb15  1  0.250  0.511  0.429  1.0
  O  O16  1  0.250  0.559  0.037  1.0
  O  O17  1  0.750  0.441  0.963  1.0
  O  O18  1  0.750  0.941  0.537  1.0
  O  O19  1  0.250  0.059  0.463  1.0
  O  O20  1  0.250  0.714  0.609  1.0
  O  O21  1  0.750  0.286  0.391  1.0
  O  O22  1  0.750  0.786  0.109  1.0
  O  O23  1  0.250  0.214  0.891  1.0
  O  O24  1  0.250  0.733  0.891  1.0
  O  O25  1  0.750  0.267  0.109  1.0
  O  O26  1  0.750  0.767  0.391  1.0
  O  O27  1  0.250  0.233  0.609  1.0
  O  O28  1  0.250  0.728  0.750  1.0
  O  O29  1  0.750  0.272  0.250  1.0
  O  O30  1  0.750  0.772  0.250  1.0
  O  O31  1  0.250  0.228  0.750  1.0
  O  O32  1  0.250  0.520  0.323  1.0
  O  O33  1  0.750  0.480  0.677  1.0
  O  O34  1  0.750  0.980  0.823  1.0
  O  O35  1  0.250  0.020  0.177  1.0
[/CIF]
.