data_TlBr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.75
_cell_length_b   6.75
_cell_length_c   5.06
_cell_angle_alpha   90.17
_cell_angle_beta   90.17
_cell_angle_gamma   38.43
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TlBr
_chemical_formula_sum   'Tl2 Br2'
_cell_volume   143.32
_cell_formula_units_Z   2
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
  Tl  Tl2  1  0.86  0.0  0.77  1.0
  Tl  Tl3  1  0.88  0.0  0.29  1.0
  Br  Br0  1  0.05  0.0  0.82  1.0
  Br  Br1  1  0.69  0.0  0.24  1.0

data_TlBr
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.44
_cell_length_b   5.06
_cell_length_c   6.75
_cell_angle_alpha   90.17
_cell_angle_beta   109.21
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   TlBr
_chemical_formula_sum   'Tl2 Br2'
_cell_volume   143.32
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Tl  Tl0  2  0.0  0.26  0.51  1.0
  Br  Br1  2  0.0  0.21  0.32  1.0

Tl Tl Br Br
Tl Tl Br Br 0 2 + o o 1 3 o o o 
TlBr crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two thallium(i) bromide molecules. Tl(1) is bonded in a single-bond geometry to one Br(1) atom. The Tl(1)-Br(1) bond length is 1.33 Å. Br(1) is bonded in a single-bond geometry to one Tl(1) atom.