The structure described by HfTc2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. Hf(1) is bonded in a 12-coordinate geometry to three equivalent Tc(1) and nine equivalent Tc(2) atoms. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Hf(1) and six equivalent Tc(2) atoms to form a mixture of edge, corner, and face-sharing TcHf6Tc6 cuboctahedra. In the second Tc site, Tc(2) is bonded to six equivalent Hf(1), two equivalent Tc(1), and four equivalent Tc(2) atoms to form a mixture of edge, corner, and face-sharing TcHf6Tc6 cuboctahedra. is represented by the CIF card [CIF]
data_HfTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.179
_cell_length_b   5.179
_cell_length_c   8.629
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.018
_symmetry_Int_Tables_number   1
_cell_volume   200.400
_cell_formula_units_Z   4
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
  Hf  Hf0  1  0.667  0.333  0.563  1.0
  Hf  Hf1  1  0.333  0.667  0.437  1.0
  Hf  Hf2  1  0.333  0.667  0.063  1.0
  Hf  Hf3  1  0.667  0.333  0.937  1.0
  Tc  Tc4  1  0.000  0.000  0.500  1.0
  Tc  Tc5  1  0.000  0.000  0.000  1.0
  Tc  Tc6  1  0.173  0.345  0.750  1.0
  Tc  Tc7  1  0.173  0.827  0.750  1.0
  Tc  Tc8  1  0.655  0.827  0.750  1.0
  Tc  Tc9  1  0.827  0.655  0.250  1.0
  Tc  Tc10  1  0.827  0.173  0.250  1.0
  Tc  Tc11  1  0.345  0.173  0.250  1.0
[/CIF]
.
The structure described by HfTc2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. Hf(1) is bonded in a 12-coordinate geometry to three equivalent Tc(1) and nine equivalent Tc(2) atoms. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Hf(1) and six equivalent Tc(2) atoms to form a mixture of edge, corner, and face-sharing TcHf6Tc6 cuboctahedra. In the second Tc site, Tc(2) is bonded to six equivalent Hf(1), two equivalent Tc(1), and four equivalent Tc(2) atoms to form a mixture of edge, corner, and face-sharing TcHf6Tc6 cuboctahedra. is represented by the CIF card [CIF]
data_HfTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.179
_cell_length_b   5.179
_cell_length_c   8.629
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.018
_symmetry_Int_Tables_number   1
_cell_volume   200.400
_cell_formula_units_Z   4
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
  Hf  Hf0  1  0.667  0.333  0.563  1.0
  Hf  Hf1  1  0.333  0.667  0.437  1.0
  Hf  Hf2  1  0.333  0.667  0.063  1.0
  Hf  Hf3  1  0.667  0.333  0.937  1.0
  Tc  Tc4  1  0.000  0.000  0.500  1.0
  Tc  Tc5  1  0.000  0.000  0.000  1.0
  Tc  Tc6  1  0.173  0.345  0.750  1.0
  Tc  Tc7  1  0.173  0.827  0.750  1.0
  Tc  Tc8  1  0.655  0.827  0.750  1.0
  Tc  Tc9  1  0.827  0.655  0.250  1.0
  Tc  Tc10  1  0.827  0.173  0.250  1.0
  Tc  Tc11  1  0.345  0.173  0.250  1.0
[/CIF]
.