The material described by Pb2CrO5 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded in a tetrahedral geometry to one O(3), one O(4), and two equivalent O(2) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted pentagonal planar geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pb(1) and two equivalent Pb(2) atoms to form edge-sharing OPb4 tetrahedra. In the second O site, O(2) is bonded in a single-bond geometry to one Cr(1), one Pb(1), and one Pb(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cr(1) and one Pb(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Pb(1) atom. is represented by the CIF file [CIF]
data_CrPb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.548
_cell_length_b   7.548
_cell_length_c   7.152
_cell_angle_alpha   67.379
_cell_angle_beta   67.379
_cell_angle_gamma   44.420
_symmetry_Int_Tables_number   1
_cell_volume   259.405
_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
  Cr  Cr0  1  0.171  0.171  0.841  1.0
  Cr  Cr1  1  0.829  0.829  0.159  1.0
  Pb  Pb2  1  0.482  0.482  0.766  1.0
  Pb  Pb3  1  0.518  0.518  0.234  1.0
  Pb  Pb4  1  0.143  0.143  0.389  1.0
  Pb  Pb5  1  0.857  0.857  0.611  1.0
  O  O6  1  0.252  0.748  0.500  1.0
  O  O7  1  0.748  0.252  0.500  1.0
  O  O8  1  0.085  0.619  0.271  1.0
  O  O9  1  0.381  0.915  0.729  1.0
  O  O10  1  0.915  0.381  0.729  1.0
  O  O11  1  0.619  0.085  0.271  1.0
  O  O12  1  0.905  0.905  0.909  1.0
  O  O13  1  0.095  0.095  0.091  1.0
  O  O14  1  0.296  0.296  0.801  1.0
  O  O15  1  0.704  0.704  0.199  1.0
[/CIF]
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The material described by Pb2CrO5 crystallizes in the monoclinic C2/m space group. Cr(1) is bonded in a tetrahedral geometry to one O(3), one O(4), and two equivalent O(2) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted pentagonal planar geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pb(1) and two equivalent Pb(2) atoms to form edge-sharing OPb4 tetrahedra. In the second O site, O(2) is bonded in a single-bond geometry to one Cr(1), one Pb(1), and one Pb(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cr(1) and one Pb(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Pb(1) atom. is represented by the CIF file [CIF]
data_CrPb2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.548
_cell_length_b   7.548
_cell_length_c   7.152
_cell_angle_alpha   67.379
_cell_angle_beta   67.379
_cell_angle_gamma   44.420
_symmetry_Int_Tables_number   1
_cell_volume   259.405
_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
  Cr  Cr0  1  0.171  0.171  0.841  1.0
  Cr  Cr1  1  0.829  0.829  0.159  1.0
  Pb  Pb2  1  0.482  0.482  0.766  1.0
  Pb  Pb3  1  0.518  0.518  0.234  1.0
  Pb  Pb4  1  0.143  0.143  0.389  1.0
  Pb  Pb5  1  0.857  0.857  0.611  1.0
  O  O6  1  0.252  0.748  0.500  1.0
  O  O7  1  0.748  0.252  0.500  1.0
  O  O8  1  0.085  0.619  0.271  1.0
  O  O9  1  0.381  0.915  0.729  1.0
  O  O10  1  0.915  0.381  0.729  1.0
  O  O11  1  0.619  0.085  0.271  1.0
  O  O12  1  0.905  0.905  0.909  1.0
  O  O13  1  0.095  0.095  0.091  1.0
  O  O14  1  0.296  0.296  0.801  1.0
  O  O15  1  0.704  0.704  0.199  1.0
[/CIF]
.