data_HfU2Cd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.09
_cell_length_b   5.09
_cell_length_c   5.09
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfU2Cd
_chemical_formula_sum   'Hf1 U2 Cd1'
_cell_volume   93.1
_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
  Hf  Hf1  1  0.6  0.6  0.6  1.0
  U  U2  1  0.4  0.4  0.4  1.0
  U  U3  1  0.8  0.8  0.8  1.0
  Cd  Cd0  1  0.0  0.0  0.0  1.0

data_HfU2Cd
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.09
_cell_length_b   5.09
_cell_length_c   12.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   HfU2Cd
_chemical_formula_sum   'Hf3 U6 Cd3'
_cell_volume   279.3
_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
  Hf  Hf0  3  0.0  0.0  0.4  1.0
  U  U1  3  0.0  0.0  0.2  1.0
  U  U2  3  0.0  0.0  0.6  1.0
  Cd  Cd3  3  0.0  0.0  0.0  1.0

Hf U U Cd
Hf U U Cd 0 1 o o o 0 1 o + o 0 1 + o o 0 1 o o + 0 3 o + + 0 3 + o + 0 3 + + o 0 2 o o o 1 3 o o + 1 3 o + o 1 3 + o o 1 2 - o o 1 2 o - o 1 2 o o - 2 3 + + + 2 3 + + o 2 3 o + + 2 3 + o + 
U2HfCd crystallizes in the trigonal R3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 4-coordinate geometry to one Hf(1) and three equivalent Cd(1) atoms. The U(1)-Hf(1) bond length is 2.51 Å. All U(1)-Cd(1) bond lengths are 3.04 Å. In the second U site, U(2) is bonded in a distorted linear geometry to one Hf(1) and four equivalent Cd(1) atoms. The U(2)-Hf(1) bond length is 2.51 Å. There is one shorter (2.51 Å) and three longer (3.37 Å) U(2)-Cd(1) bond lengths. Hf(1) is bonded in a 5-coordinate geometry to one U(1), one U(2), and three equivalent Cd(1) atoms. All Hf(1)-Cd(1) bond lengths are 3.06 Å. Cd(1) is bonded in a 10-coordinate geometry to three equivalent U(1), four equivalent U(2), and three equivalent Hf(1) atoms.