data_HfTlTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.53
_cell_length_b   4.53
_cell_length_c   3.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTlTc2
_chemical_formula_sum   'Hf1 Tl1 Tc2'
_cell_volume   70.28
_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  0.0  1.0
  Tl  Tl3  1  0.26  0.26  0.0  1.0
  Tc  Tc1  1  0.0  0.26  0.71  1.0
  Tc  Tc2  1  0.26  0.0  0.71  1.0

data_HfTlTc2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.4
_cell_length_b   6.4
_cell_length_c   3.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfTlTc2
_chemical_formula_sum   'Hf2 Tl2 Tc4'
_cell_volume   140.56
_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  0.0  1.0
  Tl  Tl1  2  0.26  0.0  -0.0  1.0
  Tc  Tc2  4  0.13  0.13  0.71  1.0

Hf Tl Tc Tc
HfTc2Tl crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HfTc2Tl clusters. Hf(1) is bonded in a 3-coordinate geometry to two equivalent Tc(1) and one Tl(1) atom. Both Hf(1)-Tc(1) bond lengths are 1.55 Å. The Hf(1)-Tl(1) bond length is 1.69 Å. Tc(1) is bonded in a 2-coordinate geometry to one Hf(1) and one Tl(1) atom. The Tc(1)-Tl(1) bond length is 1.55 Å. Tl(1) is bonded in a 3-coordinate geometry to one Hf(1) and two equivalent Tc(1) atoms.