data_YLuCu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.81
_cell_length_b   4.81
_cell_length_c   4.81
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YLuCu2
_chemical_formula_sum   'Y1 Lu1 Cu2'
_cell_volume   78.9
_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
  Y  Y3  1  0.0  0.0  0.0  1.0
  Lu  Lu2  1  0.4  0.4  0.4  1.0
  Cu  Cu0  1  0.7  0.7  0.7  1.0
  Cu  Cu1  1  0.11  0.11  0.11  1.0

data_YLuCu2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.81
_cell_length_b   4.81
_cell_length_c   11.79
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   YLuCu2
_chemical_formula_sum   'Y3 Lu3 Cu6'
_cell_volume   236.69
_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
  Y  Y0  3  0.0  0.0  0.0  1.0
  Lu  Lu1  3  0.0  0.0  0.6  1.0
  Cu  Cu2  3  0.0  0.0  0.3  1.0
  Cu  Cu3  3  0.0  0.0  0.89  1.0

Y Lu Cu Cu
LuYCu2 crystallizes in the trigonal R3m space group. Lu(1) is bonded in a 11-coordinate geometry to three equivalent Y(1), four equivalent Cu(1), and four equivalent Cu(2) atoms. All Lu(1)-Y(1) bond lengths are 2.90 Å. There are three shorter (2.81 Å) and one longer (3.51 Å) Lu(1)-Cu(1) bond length. There are three shorter (2.81 Å) and one longer (3.51 Å) Lu(1)-Cu(2) bond length. Y(1) is bonded in a single-bond geometry to three equivalent Lu(1), one Cu(2), and four equivalent Cu(1) atoms. The Y(1)-Cu(2) bond length is 1.25 Å. There are three shorter (2.81 Å) and one longer (3.51 Å) Y(1)-Cu(1) bond length. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to four equivalent Lu(1) and four equivalent Y(1) atoms. In the second Cu site, Cu(2) is bonded in a single-bond geometry to four equivalent Lu(1) and one Y(1) atom.