data_TaTcAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.83
_cell_length_b   4.83
_cell_length_c   4.83
_cell_angle_alpha   129.7
_cell_angle_beta   129.7
_cell_angle_gamma   73.88
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaTcAs2
_chemical_formula_sum   'Ta1 Tc1 As2'
_cell_volume   65.07
_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  0.05  0.0  0.93  1.0
  Tc  Tc3  1  0.0  0.0  0.86  1.0
  As  As0  1  0.0  0.05  0.93  1.0
  As  As1  1  0.0  0.0  0.0  1.0

data_TaTcAs2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.11
_cell_length_b   4.11
_cell_length_c   4.83
_cell_angle_alpha   115.15
_cell_angle_beta   115.15
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaTcAs2
_chemical_formula_sum   'Ta1 Tc1 As2'
_cell_volume   65.07
_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  0.07  0.0  0.12  1.0
  Tc  Tc1  1  0.14  0.0  0.14  1.0
  As  As2  1  0.0  0.0  0.0  1.0
  As  As3  1  0.12  0.05  0.12  1.0

Ta Tc As As
TaTcAs2 is Copper structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one TaTcAs2 cluster. Ta(1) is bonded in a 3-coordinate geometry to one Tc(1), one As(1), and one As(2) atom. The Ta(1)-Tc(1) bond length is 0.26 Å. The Ta(1)-As(1) bond length is 0.31 Å. The Ta(1)-As(2) bond length is 0.54 Å. Tc(1) is bonded in a 2-coordinate geometry to one Ta(1) and one As(1) atom. The Tc(1)-As(1) bond length is 0.26 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 2-coordinate geometry to one Ta(1) and one Tc(1) atom. In the second As site, As(2) is bonded in a distorted single-bond geometry to one Ta(1) atom.