data_TaCu2Os
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.67
_cell_length_b   4.67
_cell_length_c   4.74
_cell_angle_alpha   99.06
_cell_angle_beta   99.06
_cell_angle_gamma   34.11
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCu2Os
_chemical_formula_sum   'Ta1 Cu2 Os1'
_cell_volume   57.22
_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  Ta3  1  0.49  0.0  0.2  1.0
  Cu  Cu0  1  0.12  0.0  0.57  1.0
  Cu  Cu1  1  0.64  0.0  0.57  1.0
  Os  Os2  1  0.14  0.0  0.33  1.0

data_TaCu2Os
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.74
_cell_length_b   4.67
_cell_length_c   4.74
_cell_angle_alpha   99.06
_cell_angle_beta   90.0
_cell_angle_gamma   107.06
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCu2Os
_chemical_formula_sum   'Ta1 Cu2 Os1'
_cell_volume   57.22
_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  Ta0  1  0.0  0.51  0.8  1.0
  Cu  Cu1  1  0.0  0.36  0.43  1.0
  Cu  Cu2  1  0.0  0.88  0.43  1.0
  Os  Os3  1  0.0  0.86  0.67  1.0

Ta Cu Cu Os
TaOsCu2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one TaOsCu2 cluster. Ta(1) is bonded in a distorted L-shaped geometry to one Os(1) and one Cu(2) atom. The Ta(1)-Os(1) bond length is 1.81 Å. The Ta(1)-Cu(2) bond length is 1.79 Å. Os(1) is bonded in a distorted bent 120 degrees geometry to one Ta(1) and one Cu(1) atom. The Os(1)-Cu(1) bond length is 1.15 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Os(1) atom. In the second Cu site, Cu(2) is bonded in a single-bond geometry to one Ta(1) atom.