The material described by Ta crystallizes in the hexagonal P6_322 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 8-coordinate geometry to two equivalent Ta(2) and six equivalent Ta(1) atoms. In the second Ta site, Ta(2) is bonded in a distorted hexagonal planar geometry to six equivalent Ta(1) atoms. is represented by the CIF card [CIF]
data_Ta
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.983
_cell_length_b   4.984
_cell_length_c   8.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.012
_symmetry_Int_Tables_number   1
_cell_volume   176.404
_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  0.000  0.321  0.250  1.0
  Ta  Ta1  1  0.679  0.679  0.250  1.0
  Ta  Ta2  1  0.321  0.000  0.250  1.0
  Ta  Ta3  1  0.000  0.679  0.750  1.0
  Ta  Ta4  1  0.321  0.321  0.750  1.0
  Ta  Ta5  1  0.679  1.000  0.750  1.0
  Ta  Ta6  1  0.334  0.667  0.500  1.0
  Ta  Ta7  1  0.666  0.333  0.000  1.0
[/CIF]
.
The material described by Ta crystallizes in the hexagonal P6_322 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 8-coordinate geometry to two equivalent Ta(2) and six equivalent Ta(1) atoms. In the second Ta site, Ta(2) is bonded in a distorted hexagonal planar geometry to six equivalent Ta(1) atoms. is represented by the CIF card [CIF]
data_Ta
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.983
_cell_length_b   4.984
_cell_length_c   8.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.012
_symmetry_Int_Tables_number   1
_cell_volume   176.404
_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  0.000  0.321  0.250  1.0
  Ta  Ta1  1  0.679  0.679  0.250  1.0
  Ta  Ta2  1  0.321  0.000  0.250  1.0
  Ta  Ta3  1  0.000  0.679  0.750  1.0
  Ta  Ta4  1  0.321  0.321  0.750  1.0
  Ta  Ta5  1  0.679  1.000  0.750  1.0
  Ta  Ta6  1  0.334  0.667  0.500  1.0
  Ta  Ta7  1  0.666  0.333  0.000  1.0
[/CIF]
.