data_CeEuU2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   5.56
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CeEuU2
_chemical_formula_sum   'Ce1 Eu1 U2'
_cell_volume   121.61
_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  0.0  0.0  0.0  1.0
  Eu  Eu1  1  0.93  0.93  0.93  1.0
  U  U2  1  0.97  0.97  0.97  1.0
  U  U3  1  0.9  0.9  0.9  1.0

data_CeEuU2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   13.62
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   CeEuU2
_chemical_formula_sum   'Ce3 Eu3 U6'
_cell_volume   364.83
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Eu  Eu1  3  0.0  0.0  0.07  1.0
  U  U2  3  0.0  0.0  0.03  1.0
  U  U3  3  0.0  0.0  0.1  1.0

Ce Eu U U
U2EuCe is Copper structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three U2EuCe clusters. There are two inequivalent U sites. In the first U site, U(1) is bonded in a linear geometry to one Eu(1) and one Ce(1) atom. The U(1)-Eu(1) bond length is 0.46 Å. The U(1)-Ce(1) bond length is 0.46 Å. In the second U site, U(2) is bonded in a single-bond geometry to one Eu(1) atom. The U(2)-Eu(1) bond length is 0.46 Å. Eu(1) is bonded in a linear geometry to one U(1) and one U(2) atom. Ce(1) is bonded in a single-bond geometry to one U(1) atom.