data_TaCuTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.77
_cell_length_b   2.77
_cell_length_c   6.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCuTc
_chemical_formula_sum   'Ta1 Cu1 Tc1'
_cell_volume   46.25
_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  Ta1  1  0.38  0.8  0.28  1.0
  Cu  Cu0  1  0.0  0.0  0.92  1.0
  Tc  Tc2  1  0.0  0.6  0.72  1.0

data_TaCuTc
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.77
_cell_length_b   2.77
_cell_length_c   6.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCuTc
_chemical_formula_sum   'Ta1 Cu1 Tc1'
_cell_volume   46.25
_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  0.38  0.8  0.28  1.0
  Tc  Tc1  1  -0.0  0.6  0.72  1.0
  Cu  Cu2  1  0.0  0.0  0.92  1.0

Ta Cu Tc
Ta Cu Tc 0 2 o o o 0 0 + + o 0 0 o + o 0 0 + o o 0 1 o + - 0 1 o o - 0 1 + + - 1 2 o - o 
TaTcCu crystallizes in the triclinic P1 space group. Ta(1) is bonded in a 10-coordinate geometry to six equivalent Ta(1), one Tc(1), and three equivalent Cu(1) atoms. All Ta(1)-Ta(1) bond lengths are 2.77 Å. The Ta(1)-Tc(1) bond length is 3.23 Å. There are a spread of Ta(1)-Cu(1) bond distances ranging from 2.85-3.13 Å. Tc(1) is bonded in a 1-coordinate geometry to one Ta(1) and one Cu(1) atom. The Tc(1)-Cu(1) bond length is 1.78 Å. Cu(1) is bonded in a 1-coordinate geometry to three equivalent Ta(1) and one Tc(1) atom.