data_LuU2Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   4.98
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LuU2Ir
_chemical_formula_sum   'Lu1 U2 Ir1'
_cell_volume   87.51
_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
  Lu  Lu1  1  0.0  0.0  0.0  1.0
  U  U2  1  0.76  0.76  0.76  1.0
  U  U3  1  0.29  0.29  0.29  1.0
  Ir  Ir0  1  0.52  0.52  0.52  1.0

data_LuU2Ir
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   12.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LuU2Ir
_chemical_formula_sum   'Lu3 U6 Ir3'
_cell_volume   262.53
_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
  Lu  Lu0  3  0.0  0.0  0.0  1.0
  U  U1  3  0.0  0.0  0.24  1.0
  U  U2  3  0.0  0.0  0.71  1.0
  Ir  Ir3  3  0.0  0.0  0.48  1.0

Lu U U Ir
Lu U U Ir 0 1 - - - 0 1 - - o 0 1 o - - 0 1 - o - 0 3 - - o 0 3 - o - 0 3 o - - 0 2 - o o 0 2 o - o 0 2 o o - 0 2 o o o 1 3 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 o - o 2 3 - o o 2 3 o o - 2 3 o o o 
U2LuIr is Heusler structured and crystallizes in the trigonal R3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to four equivalent Lu(1) and four equivalent Ir(1) atoms. There is one shorter (2.91 Å) and three longer (3.10 Å) U(1)-Lu(1) bond lengths. There is one shorter (2.91 Å) and three longer (3.10 Å) U(1)-Ir(1) bond lengths. In the second U site, U(2) is bonded in a 7-coordinate geometry to four equivalent Lu(1) and four equivalent Ir(1) atoms. There are three shorter (2.94 Å) and one longer (3.49 Å) U(2)-Lu(1) bond length. There is one shorter (2.91 Å) and three longer (3.10 Å) U(2)-Ir(1) bond lengths. Lu(1) is bonded in a 14-coordinate geometry to four equivalent U(1), four equivalent U(2), and six equivalent Ir(1) atoms. There are three shorter (3.36 Å) and three longer (3.70 Å) Lu(1)-Ir(1) bond lengths. Ir(1) is bonded in a 8-coordinate geometry to four equivalent U(1), four equivalent U(2), and six equivalent Lu(1) atoms.