The compound described by UPb2 crystallizes in the tetragonal I4_1/amd space group. U(1) is bonded to six equivalent Pb(1) atoms to form distorted edge-sharing UPb6 octahedra. Pb(1) is bonded in a 3-coordinate geometry to three equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.667
_cell_length_b   8.667
_cell_length_c   8.721
_cell_angle_alpha   119.796
_cell_angle_beta   119.796
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   466.107
_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
  U  U0  1  0.125  0.875  0.250  1.0
  U  U1  1  0.125  0.375  0.250  1.0
  U  U2  1  0.625  0.875  0.750  1.0
  U  U3  1  0.125  0.875  0.750  1.0
  Pb  Pb4  1  0.402  0.596  0.805  1.0
  Pb  Pb5  1  0.402  0.208  0.805  1.0
  Pb  Pb6  1  0.458  0.152  0.305  1.0
  Pb  Pb7  1  0.848  0.542  0.695  1.0
  Pb  Pb8  1  0.848  0.154  0.695  1.0
  Pb  Pb9  1  0.846  0.152  0.305  1.0
  Pb  Pb10  1  0.792  0.598  0.195  1.0
  Pb  Pb11  1  0.404  0.598  0.195  1.0
[/CIF]
.
The compound described by UPb2 crystallizes in the tetragonal I4_1/amd space group. U(1) is bonded to six equivalent Pb(1) atoms to form distorted edge-sharing UPb6 octahedra. Pb(1) is bonded in a 3-coordinate geometry to three equivalent U(1) atoms. is represented by the CIF file [CIF]
data_UPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.667
_cell_length_b   8.667
_cell_length_c   8.721
_cell_angle_alpha   119.796
_cell_angle_beta   119.796
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   466.107
_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
  U  U0  1  0.125  0.875  0.250  1.0
  U  U1  1  0.125  0.375  0.250  1.0
  U  U2  1  0.625  0.875  0.750  1.0
  U  U3  1  0.125  0.875  0.750  1.0
  Pb  Pb4  1  0.402  0.596  0.805  1.0
  Pb  Pb5  1  0.402  0.208  0.805  1.0
  Pb  Pb6  1  0.458  0.152  0.305  1.0
  Pb  Pb7  1  0.848  0.542  0.695  1.0
  Pb  Pb8  1  0.848  0.154  0.695  1.0
  Pb  Pb9  1  0.846  0.152  0.305  1.0
  Pb  Pb10  1  0.792  0.598  0.195  1.0
  Pb  Pb11  1  0.404  0.598  0.195  1.0
[/CIF]
.