The material structure described by Pb3Ge crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to four equivalent Pb(1), four equivalent Pb(2), and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing PbGe4Pb8 cuboctahedra. In the second Pb site, Pb(2) is bonded to eight equivalent Pb(1) and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing PbGe4Pb8 cuboctahedra. Ge(1) is bonded in a 12-coordinate geometry to four equivalent Pb(2) and eight equivalent Pb(1) atoms. is represented by the CIF card [CIF]
data_GePb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.017
_cell_length_b   6.017
_cell_length_c   6.017
_cell_angle_alpha   132.185
_cell_angle_beta   132.185
_cell_angle_gamma   69.936
_symmetry_Int_Tables_number   1
_cell_volume   117.261
_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
  Ge  Ge0  1  0.000  0.000  0.000  1.0
  Pb  Pb1  1  0.750  0.250  0.500  1.0
  Pb  Pb2  1  0.250  0.750  0.500  1.0
  Pb  Pb3  1  0.500  0.500  0.000  1.0
[/CIF]
.
The material structure described by Pb3Ge crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to four equivalent Pb(1), four equivalent Pb(2), and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing PbGe4Pb8 cuboctahedra. In the second Pb site, Pb(2) is bonded to eight equivalent Pb(1) and four equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing PbGe4Pb8 cuboctahedra. Ge(1) is bonded in a 12-coordinate geometry to four equivalent Pb(2) and eight equivalent Pb(1) atoms. is represented by the CIF card [CIF]
data_GePb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.017
_cell_length_b   6.017
_cell_length_c   6.017
_cell_angle_alpha   132.185
_cell_angle_beta   132.185
_cell_angle_gamma   69.936
_symmetry_Int_Tables_number   1
_cell_volume   117.261
_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
  Ge  Ge0  1  0.000  0.000  0.000  1.0
  Pb  Pb1  1  0.750  0.250  0.500  1.0
  Pb  Pb2  1  0.250  0.750  0.500  1.0
  Pb  Pb3  1  0.500  0.500  0.000  1.0
[/CIF]
.