data_HfTlPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   4.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTlPb2
_chemical_formula_sum   'Hf1 Tl1 Pb2'
_cell_volume   106.46
_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  0.37  0.37  0.0  1.0
  Pb  Pb1  1  0.0  0.37  0.37  1.0
  Pb  Pb2  1  0.37  0.0  0.37  1.0

data_HfTlPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.71
_cell_length_b   6.71
_cell_length_c   4.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfTlPb2
_chemical_formula_sum   'Hf2 Tl2 Pb4'
_cell_volume   212.92
_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  0.37  0.0  0.0  1.0
  Pb  Pb2  4  0.19  0.19  0.37  1.0

Hf Tl Pb Pb
Hf Tl Pb Pb 0 3 o o o 0 2 o o o 0 1 o o o 1 2 o o o 1 3 o o o 2 3 o o o 
HfTlPb2 crystallizes in the monoclinic Cm space group. Hf(1) is bonded in a 9-coordinate geometry to three equivalent Tl(1) and six equivalent Pb(1) atoms. There is one shorter (2.49 Å) and two longer (3.46 Å) Hf(1)-Tl(1) bond lengths. There are a spread of Hf(1)-Pb(1) bond distances ranging from 2.47-3.48 Å. Tl(1) is bonded in a 3-coordinate geometry to three equivalent Hf(1) and two equivalent Pb(1) atoms. Both Tl(1)-Pb(1) bond lengths are 2.47 Å. Pb(1) is bonded in a 2-coordinate geometry to three equivalent Hf(1) and one Tl(1) atom.