data_Ga2PbBr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.23
_cell_length_b   6.23
_cell_length_c   6.23
_cell_angle_alpha   138.03
_cell_angle_beta   138.03
_cell_angle_gamma   60.86
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ga2PbBr
_chemical_formula_sum   'Ga2 Pb1 Br1'
_cell_volume   106.76
_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
  Ga  Ga1  1  0.23  0.0  0.68  1.0
  Ga  Ga2  1  0.0  0.23  0.68  1.0
  Pb  Pb3  1  0.0  0.0  0.37  1.0
  Br  Br0  1  0.0  0.0  0.0  1.0

data_Ga2PbBr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.31
_cell_length_b   6.31
_cell_length_c   6.23
_cell_angle_alpha   90.0
_cell_angle_beta   120.43
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ga2PbBr
_chemical_formula_sum   'Ga4 Pb2 Br2'
_cell_volume   213.51
_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
  Ga  Ga0  4  0.43  0.11  0.55  1.0
  Pb  Pb1  2  0.13  0.5  0.63  1.0
  Br  Br2  2  0.0  0.0  0.0  1.0

Ga Ga Pb Br
Ga2PbBr is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ga2PbBr clusters. Ga(1) is bonded in a distorted single-bond geometry to one Pb(1) atom. The Ga(1)-Pb(1) bond length is 1.32 Å. Pb(1) is bonded in a 3-coordinate geometry to two equivalent Ga(1) and one Br(1) atom. The Pb(1)-Br(1) bond length is 2.29 Å. Br(1) is bonded in a single-bond geometry to one Pb(1) atom.