data_Ta2CoGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   4.85
_cell_angle_alpha   135.92
_cell_angle_beta   127.71
_cell_angle_gamma   70.73
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2CoGe
_chemical_formula_sum   'Ta2 Co1 Ge1'
_cell_volume   61.55
_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  0.82  0.0  0.89  1.0
  Ta  Ta3  1  0.0  0.14  0.07  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Ge  Ge1  1  0.0  0.0  0.96  1.0

data_Ta2CoGe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.64
_cell_length_b   4.27
_cell_length_c   4.85
_cell_angle_alpha   116.15
_cell_angle_beta   112.04
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2CoGe
_chemical_formula_sum   'Ta2 Co1 Ge1'
_cell_volume   61.55
_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  0.93  0.07  0.07  1.0
  Ta  Ta1  1  0.93  0.11  0.93  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Ge  Ge3  1  0.04  0.04  0.04  1.0

Ta Ta Co Ge
Ta Ta Co Ge 0 1 + o + 0 3 + o o 0 2 + o + 1 3 o o - 1 2 o o o 2 3 o o - 
Ta2CoGe crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2CoGe cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 2-coordinate geometry to one Co(1) and one Ge(1) atom. The Ta(1)-Co(1) bond length is 0.69 Å. The Ta(1)-Ge(1) bond length is 0.72 Å. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to one Co(1) and one Ge(1) atom. The Ta(2)-Co(1) bond length is 0.48 Å. The Ta(2)-Ge(1) bond length is 0.47 Å. Co(1) is bonded in a distorted single-bond geometry to one Ta(1), one Ta(2), and one Ge(1) atom. The Co(1)-Ge(1) bond length is 0.22 Å. Ge(1) is bonded in a distorted single-bond geometry to one Ta(1), one Ta(2), and one Co(1) atom.