data_TbTl2Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   5.08
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TbTl2Cu
_chemical_formula_sum   'Tb1 Tl2 Cu1'
_cell_volume   92.87
_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
  Tb  Tb1  1  0.59  0.59  0.59  1.0
  Tl  Tl2  1  0.39  0.39  0.39  1.0
  Tl  Tl3  1  0.8  0.8  0.8  1.0
  Cu  Cu0  1  0.0  0.0  0.0  1.0

data_TbTl2Cu
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   12.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   TbTl2Cu
_chemical_formula_sum   'Tb3 Tl6 Cu3'
_cell_volume   278.6
_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
  Tb  Tb0  3  0.0  0.0  0.41  1.0
  Tl  Tl1  3  0.0  0.0  0.2  1.0
  Tl  Tl2  3  0.0  0.0  0.61  1.0
  Cu  Cu3  3  0.0  0.0  0.0  1.0

Tb Tl Tl Cu
TbCuTl2 crystallizes in the trigonal R3m space group. Tb(1) is bonded in a 11-coordinate geometry to three equivalent Cu(1), four equivalent Tl(1), and four equivalent Tl(2) atoms. All Tb(1)-Cu(1) bond lengths are 3.07 Å. There is one shorter (2.53 Å) and three longer (3.35 Å) Tb(1)-Tl(1) bond lengths. There is one shorter (2.53 Å) and three longer (3.35 Å) Tb(1)-Tl(2) bond lengths. Cu(1) is bonded in a 7-coordinate geometry to three equivalent Tb(1), one Tl(2), and three equivalent Tl(1) atoms. The Cu(1)-Tl(2) bond length is 2.53 Å. All Cu(1)-Tl(1) bond lengths are 3.02 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 1-coordinate geometry to four equivalent Tb(1) and three equivalent Cu(1) atoms. In the second Tl site, Tl(2) is bonded in a distorted linear geometry to four equivalent Tb(1) and one Cu(1) atom.