data_HfTl2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.65
_cell_length_b   5.65
_cell_length_c   5.65
_cell_angle_alpha   134.44
_cell_angle_beta   134.44
_cell_angle_gamma   66.4
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTl2Ge
_chemical_formula_sum   'Hf1 Tl2 Ge1'
_cell_volume   90.32
_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  Hf1  1  0.19  0.0  0.36  1.0
  Tl  Tl2  1  0.0  0.0  0.72  1.0
  Tl  Tl3  1  0.0  0.19  0.36  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0

data_HfTl2Ge
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.37
_cell_length_b   4.37
_cell_length_c   5.65
_cell_angle_alpha   112.78
_cell_angle_beta   112.78
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTl2Ge
_chemical_formula_sum   'Hf1 Tl2 Ge1'
_cell_volume   90.32
_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  0.64  0.0  0.82  1.0
  Tl  Tl1  1  0.28  0.0  0.28  1.0
  Tl  Tl2  1  0.82  0.19  0.82  1.0
  Ge  Ge3  1  0.0  0.0  0.0  1.0

Hf Tl Tl Ge
HfTl2Ge is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one HfTl2Ge cluster. Hf(1) is bonded in a 2-coordinate geometry to one Tl(2) and one Ge(1) atom. The Hf(1)-Tl(2) bond length is 1.15 Å. The Hf(1)-Ge(1) bond length is 1.51 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a single-bond geometry to one Ge(1) atom. The Tl(1)-Ge(1) bond length is 1.55 Å. In the second Tl site, Tl(2) is bonded in a 2-coordinate geometry to one Hf(1) and one Ge(1) atom. The Tl(2)-Ge(1) bond length is 1.51 Å. Ge(1) is bonded in a 3-coordinate geometry to one Hf(1), one Tl(1), and one Tl(2) atom.