data_Ta2ZnTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.31
_cell_length_b   4.31
_cell_length_c   3.47
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2ZnTc
_chemical_formula_sum   'Ta2 Zn1 Tc1'
_cell_volume   64.58
_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  0.16  0.73  1.0
  Ta  Ta1  1  0.16  0.0  0.73  1.0
  Zn  Zn3  1  0.0  0.0  0.0  1.0
  Tc  Tc2  1  0.16  0.16  0.0  1.0

data_Ta2ZnTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.1
_cell_length_b   6.1
_cell_length_c   3.47
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ta2ZnTc
_chemical_formula_sum   'Ta4 Zn2 Tc2'
_cell_volume   129.15
_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  4  0.08  0.08  0.73  1.0
  Zn  Zn1  2  0.0  0.0  0.0  1.0
  Tc  Tc2  2  0.16  0.0  0.0  1.0

Ta Ta Zn Tc
Ta Ta Zn Tc 0 2 o o + 0 1 o o o 0 3 o o + 1 2 o o + 1 3 o o + 2 3 o o o 
Ta2TcZn is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ta2TcZn clusters. Ta(1) is bonded in a 3-coordinate geometry to one Ta(1), one Tc(1), and one Zn(1) atom. The Ta(1)-Ta(1) bond length is 0.96 Å. The Ta(1)-Tc(1) bond length is 1.15 Å. The Ta(1)-Zn(1) bond length is 1.15 Å. Tc(1) is bonded in a 3-coordinate geometry to two equivalent Ta(1) and one Zn(1) atom. The Tc(1)-Zn(1) bond length is 0.96 Å. Zn(1) is bonded in a distorted single-bond geometry to two equivalent Ta(1) and one Tc(1) atom.