data_Ta3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.4
_cell_length_b   4.4
_cell_length_c   3.59
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta3Ge
_chemical_formula_sum   'Ta3 Ge1'
_cell_volume   69.42
_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  0.2  0.0  0.79  1.0
  Ta  Ta2  1  0.2  0.2  0.0  1.0
  Ta  Ta3  1  0.0  0.2  0.79  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0

data_Ta3Ge
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.22
_cell_length_b   6.22
_cell_length_c   3.59
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ta3Ge
_chemical_formula_sum   'Ta6 Ge2'
_cell_volume   138.83
_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  0.1  0.1  0.79  1.0
  Ta  Ta1  2  0.2  0.0  -0.0  1.0
  Ge  Ge2  2  0.0  0.0  0.0  1.0

Ta Ta Ta Ge
Ta3Ge is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ta3Ge clusters. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted single-bond geometry to one Ta(2) and one Ge(1) atom. The Ta(1)-Ta(2) bond length is 1.14 Å. The Ta(1)-Ge(1) bond length is 1.14 Å. In the second Ta site, Ta(2) is bonded in a distorted single-bond geometry to two equivalent Ta(1) and one Ge(1) atom. The Ta(2)-Ge(1) bond length is 1.24 Å. Ge(1) is bonded in a 3-coordinate geometry to one Ta(2) and two equivalent Ta(1) atoms.