data_HfTcW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.19
_cell_length_b   9.19
_cell_length_c   9.19
_cell_angle_alpha   18.56
_cell_angle_beta   18.56
_cell_angle_gamma   18.56
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTcW2
_chemical_formula_sum   'Hf1 Tc1 W2'
_cell_volume   68.77
_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
  Hf  Hf0  1  0.0  0.0  0.55  1.0
  Tc  Tc1  1  0.0  0.0  0.0  1.0
  W  W2  1  0.0  0.0  0.18  1.0
  W  W3  1  0.0  0.0  0.92  1.0

data_HfTcW2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.14
_cell_length_b   2.97
_cell_length_c   9.19
_cell_angle_alpha   90.0
_cell_angle_beta   100.73
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfTcW2
_chemical_formula_sum   'Hf2 Tc2 W4'
_cell_volume   137.54
_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
  Hf  Hf0  2  0.0  0.0  0.45  1.0
  Tc  Tc1  2  0.0  0.0  0.0  1.0
  W  W2  2  0.0  0.0  0.08  1.0
  W  W3  2  0.0  0.0  0.82  1.0

Hf Tc W W
HfW2Tc crystallizes in the monoclinic Cm space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded to six Hf(1,1); one W(1); and one W(2) atom to form a mixture of distorted corner and edge-sharing HfHf6W2 hexagonal bipyramids. All Hf(1)-Hf(1,1) bond lengths are 2.97 Å. The Hf(1)-W(1) bond length is 3.40 Å. The Hf(1)-W(2) bond length is 3.40 Å. In the second Hf site, Hf(1) is bonded to six Hf(1,1); one W(1); and one W(2) atom to form a mixture of distorted corner and edge-sharing HfHf6W2 hexagonal bipyramids. Both Hf(1)-Hf(1) bond lengths are 2.97 Å. The Hf(1)-W(1) bond length is 3.40 Å. The Hf(1)-W(2) bond length is 3.40 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one Hf(1) and one Tc(1) atom. The W(1)-Tc(1) bond length is 1.64 Å. In the second W site, W(2) is bonded in a single-bond geometry to one Hf(1) and one Tc(1) atom. The W(2)-Tc(1) bond length is 0.75 Å. Tc(1) is bonded in a distorted linear geometry to one W(1) and one W(2) atom.