The crystal structure described by U2CeO6 is Fluorite-derived structured and crystallizes in the monoclinic C2/m space group. U(1) is bonded in a body-centered cubic geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(1) and six equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent U(1) and one Ce(1) atom to form OCeU3 tetrahedra that share corners with three equivalent O(2)Ce3U tetrahedra, corners with six equivalent O(3)U4 tetrahedra, corners with seven equivalent O(1)CeU3 tetrahedra, edges with three equivalent O(2)Ce3U tetrahedra, and edges with three equivalent O(3)U4 tetrahedra. In the second O site, O(2) is bonded to one U(1) and three equivalent Ce(1) atoms to form OCe3U tetrahedra that share corners with three equivalent O(1)CeU3 tetrahedra, corners with four equivalent O(3)U4 tetrahedra, corners with nine equivalent O(2)Ce3U tetrahedra, edges with three equivalent O(2)Ce3U tetrahedra, and edges with three equivalent O(1)CeU3 tetrahedra. In the third O site, O(3) is bonded to four equivalent U(1) atoms to form OU4 tetrahedra that share corners with four equivalent O(2)Ce3U tetrahedra, corners with six equivalent O(1)CeU3 tetrahedra, corners with six equivalent O(3)U4 tetrahedra, edges with three equivalent O(1)CeU3 tetrahedra, and edges with three equivalent O(3)U4 tetrahedra. is represented by the CIF file [CIF]
data_CeU2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.857
_cell_length_b   3.888
_cell_length_c   9.345
_cell_angle_alpha   90.498
_cell_angle_beta   89.998
_cell_angle_gamma   119.739
_symmetry_Int_Tables_number   1
_cell_volume   121.675
_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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.335  0.671  0.666  1.0
  U  U2  1  0.665  0.329  0.334  1.0
  O  O3  1  0.003  0.006  0.264  1.0
  O  O4  1  0.331  0.663  0.903  1.0
  O  O5  1  0.666  0.331  0.580  1.0
  O  O6  1  0.669  0.337  0.097  1.0
  O  O7  1  0.997  0.994  0.736  1.0
  O  O8  1  0.334  0.669  0.420  1.0
[/CIF]
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The crystal structure described by U2CeO6 is Fluorite-derived structured and crystallizes in the monoclinic C2/m space group. U(1) is bonded in a body-centered cubic geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(1) and six equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent U(1) and one Ce(1) atom to form OCeU3 tetrahedra that share corners with three equivalent O(2)Ce3U tetrahedra, corners with six equivalent O(3)U4 tetrahedra, corners with seven equivalent O(1)CeU3 tetrahedra, edges with three equivalent O(2)Ce3U tetrahedra, and edges with three equivalent O(3)U4 tetrahedra. In the second O site, O(2) is bonded to one U(1) and three equivalent Ce(1) atoms to form OCe3U tetrahedra that share corners with three equivalent O(1)CeU3 tetrahedra, corners with four equivalent O(3)U4 tetrahedra, corners with nine equivalent O(2)Ce3U tetrahedra, edges with three equivalent O(2)Ce3U tetrahedra, and edges with three equivalent O(1)CeU3 tetrahedra. In the third O site, O(3) is bonded to four equivalent U(1) atoms to form OU4 tetrahedra that share corners with four equivalent O(2)Ce3U tetrahedra, corners with six equivalent O(1)CeU3 tetrahedra, corners with six equivalent O(3)U4 tetrahedra, edges with three equivalent O(1)CeU3 tetrahedra, and edges with three equivalent O(3)U4 tetrahedra. is represented by the CIF file [CIF]
data_CeU2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.857
_cell_length_b   3.888
_cell_length_c   9.345
_cell_angle_alpha   90.498
_cell_angle_beta   89.998
_cell_angle_gamma   119.739
_symmetry_Int_Tables_number   1
_cell_volume   121.675
_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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.335  0.671  0.666  1.0
  U  U2  1  0.665  0.329  0.334  1.0
  O  O3  1  0.003  0.006  0.264  1.0
  O  O4  1  0.331  0.663  0.903  1.0
  O  O5  1  0.666  0.331  0.580  1.0
  O  O6  1  0.669  0.337  0.097  1.0
  O  O7  1  0.997  0.994  0.736  1.0
  O  O8  1  0.334  0.669  0.420  1.0
[/CIF]
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