data_BiOsBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.57
_cell_length_b   5.57
_cell_length_c   5.57
_cell_angle_alpha   130.59
_cell_angle_beta   130.59
_cell_angle_gamma   72.46
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BiOsBr2
_chemical_formula_sum   'Bi1 Os1 Br2'
_cell_volume   97.63
_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
  Bi  Bi0  1  0.0  0.0  0.5  1.0
  Os  Os3  1  0.0  0.0  0.0  1.0
  Br  Br1  1  0.0  0.33  0.25  1.0
  Br  Br2  1  0.33  0.0  0.25  1.0

data_BiOsBr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.59
_cell_length_b   6.59
_cell_length_c   5.57
_cell_angle_alpha   90.0
_cell_angle_beta   126.23
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BiOsBr2
_chemical_formula_sum   'Bi2 Os2 Br4'
_cell_volume   195.27
_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
  Bi  Bi0  2  0.0  0.5  0.5  1.0
  Os  Os1  2  0.0  0.0  0.0  1.0
  Br  Br2  4  0.42  0.34  0.08  1.0

Bi Os Br Br
OsBiBr2 crystallizes in the monoclinic Cm space group. Os(1) is bonded in a water-like geometry to two equivalent Bi(1) and two equivalent Br(1) atoms. There is one shorter (2.77 Å) and one longer (2.81 Å) Os(1)-Bi(1) bond length. Both Os(1)-Br(1) bond lengths are 1.41 Å. Bi(1) is bonded in a 8-coordinate geometry to two equivalent Os(1) and six equivalent Br(1) atoms. There are a spread of Bi(1)-Br(1) bond distances ranging from 2.93-3.30 Å. Br(1) is bonded in a single-bond geometry to one Os(1) and three equivalent Bi(1) atoms.