The compound described by UCeO4 is Fluorite-derived structured and crystallizes in the trigonal R-3m space group. U(1) is bonded in a body-centered cubic geometry to two equivalent O(1) and six equivalent O(2) atoms. Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one U(1) and three equivalent Ce(1) atoms to form OCe3U tetrahedra that share corners with six equivalent O(2)CeU3 tetrahedra, corners with ten equivalent O(1)Ce3U tetrahedra, edges with three equivalent O(1)Ce3U tetrahedra, and edges with three equivalent O(2)CeU3 tetrahedra. In the second O site, O(2) is bonded to three equivalent U(1) and one Ce(1) atom to form OCeU3 tetrahedra that share corners with six equivalent O(1)Ce3U tetrahedra, corners with ten equivalent O(2)CeU3 tetrahedra, edges with three equivalent O(1)Ce3U tetrahedra, and edges with three equivalent O(2)CeU3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeUO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.651
_cell_length_b   6.651
_cell_length_c   6.651
_cell_angle_alpha   33.716
_cell_angle_beta   33.716
_cell_angle_gamma   33.716
_symmetry_Int_Tables_number   1
_cell_volume   80.782
_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  0.500  0.500  0.500  1.0
  O  O2  1  0.618  0.618  0.618  1.0
  O  O3  1  0.132  0.132  0.132  1.0
  O  O4  1  0.868  0.868  0.868  1.0
  O  O5  1  0.382  0.382  0.382  1.0
[/CIF]
.
The compound described by UCeO4 is Fluorite-derived structured and crystallizes in the trigonal R-3m space group. U(1) is bonded in a body-centered cubic geometry to two equivalent O(1) and six equivalent O(2) atoms. Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one U(1) and three equivalent Ce(1) atoms to form OCe3U tetrahedra that share corners with six equivalent O(2)CeU3 tetrahedra, corners with ten equivalent O(1)Ce3U tetrahedra, edges with three equivalent O(1)Ce3U tetrahedra, and edges with three equivalent O(2)CeU3 tetrahedra. In the second O site, O(2) is bonded to three equivalent U(1) and one Ce(1) atom to form OCeU3 tetrahedra that share corners with six equivalent O(1)Ce3U tetrahedra, corners with ten equivalent O(2)CeU3 tetrahedra, edges with three equivalent O(1)Ce3U tetrahedra, and edges with three equivalent O(2)CeU3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeUO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.651
_cell_length_b   6.651
_cell_length_c   6.651
_cell_angle_alpha   33.716
_cell_angle_beta   33.716
_cell_angle_gamma   33.716
_symmetry_Int_Tables_number   1
_cell_volume   80.782
_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  0.500  0.500  0.500  1.0
  O  O2  1  0.618  0.618  0.618  1.0
  O  O3  1  0.132  0.132  0.132  1.0
  O  O4  1  0.868  0.868  0.868  1.0
  O  O5  1  0.382  0.382  0.382  1.0
[/CIF]
.