The structure described by UPb2 crystallizes in the triclinic P-1 space group. U(1) is bonded in a 9-coordinate geometry to two equivalent U(1), three equivalent Pb(2), and four equivalent Pb(1) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to four equivalent U(1) and four equivalent Pb(2) atoms. In the second Pb site, Pb(2) is bonded in a 7-coordinate geometry to three equivalent U(1) and four equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_UPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.724
_cell_length_b   5.484
_cell_length_c   8.728
_cell_angle_alpha   78.393
_cell_angle_beta   83.248
_cell_angle_gamma   86.559
_symmetry_Int_Tables_number   1
_cell_volume   173.275
_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
  U  U0  1  0.744  0.653  0.973  1.0
  U  U1  1  0.256  0.347  0.027  1.0
  Pb  Pb2  1  0.853  0.206  0.737  1.0
  Pb  Pb3  1  0.147  0.794  0.263  1.0
  Pb  Pb4  1  0.350  0.714  0.637  1.0
  Pb  Pb5  1  0.650  0.286  0.363  1.0
[/CIF]
.
The structure described by UPb2 crystallizes in the triclinic P-1 space group. U(1) is bonded in a 9-coordinate geometry to two equivalent U(1), three equivalent Pb(2), and four equivalent Pb(1) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to four equivalent U(1) and four equivalent Pb(2) atoms. In the second Pb site, Pb(2) is bonded in a 7-coordinate geometry to three equivalent U(1) and four equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_UPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.724
_cell_length_b   5.484
_cell_length_c   8.728
_cell_angle_alpha   78.393
_cell_angle_beta   83.248
_cell_angle_gamma   86.559
_symmetry_Int_Tables_number   1
_cell_volume   173.275
_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
  U  U0  1  0.744  0.653  0.973  1.0
  U  U1  1  0.256  0.347  0.027  1.0
  Pb  Pb2  1  0.853  0.206  0.737  1.0
  Pb  Pb3  1  0.147  0.794  0.263  1.0
  Pb  Pb4  1  0.350  0.714  0.637  1.0
  Pb  Pb5  1  0.650  0.286  0.363  1.0
[/CIF]
.