data_Ta2CuOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.31
_cell_length_b   5.31
_cell_length_c   5.31
_cell_angle_alpha   145.52
_cell_angle_beta   130.11
_cell_angle_gamma   62.05
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2CuOs
_chemical_formula_sum   'Ta2 Cu1 Os1'
_cell_volume   64.24
_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  0.01  1.0
  Ta  Ta3  1  0.57  0.0  0.27  1.0
  Cu  Cu0  1  0.0  0.0  0.62  1.0
  Os  Os1  1  0.0  0.24  0.31  1.0

data_Ta2CuOs
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.15
_cell_length_b   4.48
_cell_length_c   5.31
_cell_angle_alpha   114.94
_cell_angle_beta   107.24
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2CuOs
_chemical_formula_sum   'Ta2 Cu1 Os1'
_cell_volume   64.24
_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  0.01  0.01  1.0
  Ta  Ta1  1  0.0  0.27  0.7  1.0
  Cu  Cu2  1  0.0  0.62  0.62  1.0
  Os  Os3  1  0.76  0.07  0.07  1.0

Ta Ta Cu Os
Ta2OsCu crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2OsCu cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted single-bond geometry to one Os(1) and one Cu(1) atom. The Ta(1)-Os(1) bond length is 0.91 Å. The Ta(1)-Cu(1) bond length is 2.04 Å. In the second Ta site, Ta(2) is bonded in a single-bond geometry to one Cu(1) atom. The Ta(2)-Cu(1) bond length is 1.78 Å. Os(1) is bonded in a distorted single-bond geometry to one Ta(1) atom. Cu(1) is bonded in a distorted water-like geometry to one Ta(1) and one Ta(2) atom.