The crystal structure described by Pb4Sb crystallizes in the trigonal R-3m space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to three equivalent Pb(2) and three equivalent Sb(1) atoms. In the second Pb site, Pb(2) is bonded to three equivalent Pb(1) and nine equivalent Pb(2) atoms to form a mixture of edge, face, and corner-sharing PbPb12 cuboctahedra. Sb(1) is bonded in a distorted hexagonal planar geometry to six equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SbPb4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.279
_cell_length_b   14.279
_cell_length_c   14.279
_cell_angle_alpha   14.321
_cell_angle_beta   14.321
_cell_angle_gamma   14.321
_symmetry_Int_Tables_number   1
_cell_volume   155.057
_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
  Sb  Sb0  1  0.000  0.000  0.000  1.0
  Pb  Pb1  1  0.604  0.604  0.604  1.0
  Pb  Pb2  1  0.200  0.200  0.200  1.0
  Pb  Pb3  1  0.800  0.800  0.800  1.0
  Pb  Pb4  1  0.396  0.396  0.396  1.0
[/CIF]
.
The crystal structure described by Pb4Sb crystallizes in the trigonal R-3m space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to three equivalent Pb(2) and three equivalent Sb(1) atoms. In the second Pb site, Pb(2) is bonded to three equivalent Pb(1) and nine equivalent Pb(2) atoms to form a mixture of edge, face, and corner-sharing PbPb12 cuboctahedra. Sb(1) is bonded in a distorted hexagonal planar geometry to six equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SbPb4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.279
_cell_length_b   14.279
_cell_length_c   14.279
_cell_angle_alpha   14.321
_cell_angle_beta   14.321
_cell_angle_gamma   14.321
_symmetry_Int_Tables_number   1
_cell_volume   155.057
_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
  Sb  Sb0  1  0.000  0.000  0.000  1.0
  Pb  Pb1  1  0.604  0.604  0.604  1.0
  Pb  Pb2  1  0.200  0.200  0.200  1.0
  Pb  Pb3  1  0.800  0.800  0.800  1.0
  Pb  Pb4  1  0.396  0.396  0.396  1.0
[/CIF]
.