The material described by Ta3Ge crystallizes in the tetragonal P4_2/n space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to two equivalent Ge(1) atoms. In the third Ta site, Ta(3) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ta(2), three equivalent Ta(3), and four equivalent Ta(1) atoms. is represented by the CIF file [CIF]
data_Ta3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   10.262
_cell_length_c   10.262
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   553.253
_cell_formula_units_Z   8
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  0.970  0.899  0.768  1.0
  Ta  Ta1  1  0.470  0.232  0.399  1.0
  Ta  Ta2  1  0.784  0.665  0.349  1.0
  Ta  Ta3  1  0.716  0.151  0.665  1.0
  Ta  Ta4  1  0.735  0.062  0.963  1.0
  Ta  Ta5  1  0.235  0.463  0.938  1.0
  Ta  Ta6  1  0.030  0.101  0.232  1.0
  Ta  Ta7  1  0.765  0.963  0.438  1.0
  Ta  Ta8  1  0.284  0.849  0.335  1.0
  Ta  Ta9  1  0.030  0.399  0.268  1.0
  Ta  Ta10  1  0.970  0.601  0.732  1.0
  Ta  Ta11  1  0.235  0.037  0.562  1.0
  Ta  Ta12  1  0.530  0.732  0.899  1.0
  Ta  Ta13  1  0.216  0.335  0.651  1.0
  Ta  Ta14  1  0.265  0.562  0.463  1.0
  Ta  Ta15  1  0.530  0.768  0.601  1.0
  Ta  Ta16  1  0.470  0.268  0.101  1.0
  Ta  Ta17  1  0.284  0.651  0.165  1.0
  Ta  Ta18  1  0.265  0.938  0.037  1.0
  Ta  Ta19  1  0.216  0.165  0.849  1.0
  Ta  Ta20  1  0.716  0.349  0.835  1.0
  Ta  Ta21  1  0.765  0.537  0.062  1.0
  Ta  Ta22  1  0.735  0.438  0.537  1.0
  Ta  Ta23  1  0.784  0.835  0.151  1.0
  Ge  Ge24  1  0.534  0.046  0.221  1.0
  Ge  Ge25  1  0.034  0.779  0.546  1.0
  Ge  Ge26  1  0.966  0.279  0.046  1.0
  Ge  Ge27  1  0.034  0.721  0.954  1.0
  Ge  Ge28  1  0.966  0.221  0.454  1.0
  Ge  Ge29  1  0.466  0.546  0.721  1.0
  Ge  Ge30  1  0.534  0.454  0.279  1.0
  Ge  Ge31  1  0.466  0.954  0.779  1.0
[/CIF]
.
The material described by Ta3Ge crystallizes in the tetragonal P4_2/n space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 4-coordinate geometry to four equivalent Ge(1) atoms. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to two equivalent Ge(1) atoms. In the third Ta site, Ta(3) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ta(2), three equivalent Ta(3), and four equivalent Ta(1) atoms. is represented by the CIF file [CIF]
data_Ta3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   10.262
_cell_length_c   10.262
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   553.253
_cell_formula_units_Z   8
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  0.970  0.899  0.768  1.0
  Ta  Ta1  1  0.470  0.232  0.399  1.0
  Ta  Ta2  1  0.784  0.665  0.349  1.0
  Ta  Ta3  1  0.716  0.151  0.665  1.0
  Ta  Ta4  1  0.735  0.062  0.963  1.0
  Ta  Ta5  1  0.235  0.463  0.938  1.0
  Ta  Ta6  1  0.030  0.101  0.232  1.0
  Ta  Ta7  1  0.765  0.963  0.438  1.0
  Ta  Ta8  1  0.284  0.849  0.335  1.0
  Ta  Ta9  1  0.030  0.399  0.268  1.0
  Ta  Ta10  1  0.970  0.601  0.732  1.0
  Ta  Ta11  1  0.235  0.037  0.562  1.0
  Ta  Ta12  1  0.530  0.732  0.899  1.0
  Ta  Ta13  1  0.216  0.335  0.651  1.0
  Ta  Ta14  1  0.265  0.562  0.463  1.0
  Ta  Ta15  1  0.530  0.768  0.601  1.0
  Ta  Ta16  1  0.470  0.268  0.101  1.0
  Ta  Ta17  1  0.284  0.651  0.165  1.0
  Ta  Ta18  1  0.265  0.938  0.037  1.0
  Ta  Ta19  1  0.216  0.165  0.849  1.0
  Ta  Ta20  1  0.716  0.349  0.835  1.0
  Ta  Ta21  1  0.765  0.537  0.062  1.0
  Ta  Ta22  1  0.735  0.438  0.537  1.0
  Ta  Ta23  1  0.784  0.835  0.151  1.0
  Ge  Ge24  1  0.534  0.046  0.221  1.0
  Ge  Ge25  1  0.034  0.779  0.546  1.0
  Ge  Ge26  1  0.966  0.279  0.046  1.0
  Ge  Ge27  1  0.034  0.721  0.954  1.0
  Ge  Ge28  1  0.966  0.221  0.454  1.0
  Ge  Ge29  1  0.466  0.546  0.721  1.0
  Ge  Ge30  1  0.534  0.454  0.279  1.0
  Ge  Ge31  1  0.466  0.954  0.779  1.0
[/CIF]
.