data_SbBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.3
_cell_length_b   7.3
_cell_length_c   3.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SbBr2
_chemical_formula_sum   'Sb2 Br4'
_cell_volume   198.86
_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
  Sb  Sb4  1  0.0  0.0  0.0  1.0
  Sb  Sb5  1  0.65  0.65  0.87  1.0
  Br  Br0  1  0.99  0.99  0.0  1.0
  Br  Br1  1  0.31  0.31  0.0  1.0
  Br  Br2  1  0.64  0.66  0.87  1.0
  Br  Br3  1  0.66  0.64  0.87  1.0

data_SbBr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   10.33
_cell_length_b   10.33
_cell_length_c   3.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SbBr2
_chemical_formula_sum   'Sb4 Br8'
_cell_volume   397.72
_cell_formula_units_Z   4
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
  Sb  Sb0  2  0.0  0.0  0.0  1.0
  Sb  Sb1  2  0.15  0.5  0.87  1.0
  Br  Br2  4  0.15  0.49  0.87  1.0
  Br  Br3  2  0.31  0.0  0.0  1.0
  Br  Br4  2  0.49  0.5  0.0  1.0

Sb Sb Br Br Br Br
Sb Sb Br Br Br Br 0 2 - - o 0 3 o o o 1 4 o o o 1 5 o o o 1 3 o o + 2 3 + + o 3 5 o o - 3 4 o o - 3 3 o o + 
SbBr2 is Cyanogen Chloride-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of four SbBr2 clusters. In two of the SbBr2 clusters, Sb(1) is bonded in a single-bond geometry to one Br(1) and one Br(2) atom. The Sb(1)-Br(1) bond length is 0.07 Å. The Sb(1)-Br(2) bond length is 3.18 Å. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a single-bond geometry to one Sb(1) atom. In the second Br site, Br(2) is bonded in a single-bond geometry to one Sb(1) atom. In two of the SbBr2 clusters, Sb(2) is bonded in a linear geometry to two equivalent Br(3) atoms. Both Sb(2)-Br(3) bond lengths are 0.07 Å. Br(3) is bonded in a single-bond geometry to one Sb(2) atom.