The crystal structure described by Pb2MgUO6 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU(PbO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.845
_cell_length_b   5.874
_cell_length_c   10.272
_cell_angle_alpha   55.959
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   292.218
_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
  Mg  Mg0  1  0.000  0.500  0.000  1.0
  Mg  Mg1  1  0.500  0.500  0.500  1.0
  U  U2  1  0.000  0.000  0.500  1.0
  U  U3  1  0.500  0.000  0.000  1.0
  Pb  Pb4  1  0.972  0.282  0.739  1.0
  Pb  Pb5  1  0.528  0.282  0.239  1.0
  Pb  Pb6  1  0.028  0.718  0.261  1.0
  Pb  Pb7  1  0.472  0.718  0.761  1.0
  O  O8  1  0.519  0.303  0.749  1.0
  O  O9  1  0.981  0.303  0.249  1.0
  O  O10  1  0.481  0.697  0.251  1.0
  O  O11  1  0.019  0.697  0.751  1.0
  O  O12  1  0.695  0.713  0.986  1.0
  O  O13  1  0.805  0.713  0.486  1.0
  O  O14  1  0.305  0.287  0.014  1.0
  O  O15  1  0.195  0.287  0.514  1.0
  O  O16  1  0.789  0.176  0.022  1.0
  O  O17  1  0.711  0.176  0.522  1.0
  O  O18  1  0.211  0.824  0.978  1.0
  O  O19  1  0.289  0.824  0.478  1.0
[/CIF]
.
The crystal structure described by Pb2MgUO6 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. Pb(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one U(1), and two equivalent Pb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgU(PbO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.845
_cell_length_b   5.874
_cell_length_c   10.272
_cell_angle_alpha   55.959
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   292.218
_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
  Mg  Mg0  1  0.000  0.500  0.000  1.0
  Mg  Mg1  1  0.500  0.500  0.500  1.0
  U  U2  1  0.000  0.000  0.500  1.0
  U  U3  1  0.500  0.000  0.000  1.0
  Pb  Pb4  1  0.972  0.282  0.739  1.0
  Pb  Pb5  1  0.528  0.282  0.239  1.0
  Pb  Pb6  1  0.028  0.718  0.261  1.0
  Pb  Pb7  1  0.472  0.718  0.761  1.0
  O  O8  1  0.519  0.303  0.749  1.0
  O  O9  1  0.981  0.303  0.249  1.0
  O  O10  1  0.481  0.697  0.251  1.0
  O  O11  1  0.019  0.697  0.751  1.0
  O  O12  1  0.695  0.713  0.986  1.0
  O  O13  1  0.805  0.713  0.486  1.0
  O  O14  1  0.305  0.287  0.014  1.0
  O  O15  1  0.195  0.287  0.514  1.0
  O  O16  1  0.789  0.176  0.022  1.0
  O  O17  1  0.711  0.176  0.522  1.0
  O  O18  1  0.211  0.824  0.978  1.0
  O  O19  1  0.289  0.824  0.478  1.0
[/CIF]
.