data_TaTlCu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.98
_cell_length_b   2.98
_cell_length_c   7.65
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaTlCu2
_chemical_formula_sum   'Ta1 Tl1 Cu2'
_cell_volume   67.78
_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
  Ta  Ta2  1  0.0  0.0  0.0  1.0
  Tl  Tl3  1  0.0  0.0  0.83  1.0
  Cu  Cu0  1  0.49  0.49  0.87  1.0
  Cu  Cu1  1  0.49  0.49  0.79  1.0

data_TaTlCu2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.21
_cell_length_b   4.21
_cell_length_c   7.65
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TaTlCu2
_chemical_formula_sum   'Ta2 Tl2 Cu4'
_cell_volume   135.56
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Ta  Ta0  2  0.0  0.0  0.0  1.0
  Tl  Tl1  2  0.0  0.0  0.83  1.0
  Cu  Cu2  2  0.49  0.0  0.79  1.0
  Cu  Cu3  2  0.49  0.0  0.87  1.0

Ta Tl Cu Cu
TaTl(Cu)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Cu clusters and two TaTl clusters. In each Cu cluster, there are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Cu(2) atom. The Cu(1)-Cu(2) bond length is 0.61 Å. In the second Cu site, Cu(2) is bonded in a single-bond geometry to one Cu(1) atom. In each TaTl cluster, Ta(1) is bonded in a single-bond geometry to one Tl(1) atom. The Ta(1)-Tl(1) bond length is 1.33 Å. Tl(1) is bonded in a single-bond geometry to one Ta(1) atom.