data_SnGeBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.66
_cell_length_b   3.66
_cell_length_c   8.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnGeBr2
_chemical_formula_sum   'Sn1 Ge1 Br2'
_cell_volume   108.96
_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
  Sn  Sn3  1  0.83  0.83  0.88  1.0
  Ge  Ge2  1  0.0  0.0  0.16  1.0
  Br  Br0  1  0.0  0.0  0.69  1.0
  Br  Br1  1  0.83  0.83  0.6  1.0

data_SnGeBr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   8.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SnGeBr2
_chemical_formula_sum   'Sn2 Ge2 Br4'
_cell_volume   217.92
_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
  Sn  Sn0  2  0.33  0.5  0.88  1.0
  Ge  Ge1  2  0.0  0.0  0.16  1.0
  Br  Br2  2  0.0  0.0  0.69  1.0
  Br  Br3  2  0.33  0.5  0.6  1.0

Sn Ge Br Br
SnGeBr2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SnGeBr2 clusters. Sn(1) is bonded in a distorted single-bond geometry to one Ge(1), one Br(1), and one Br(2) atom. The Sn(1)-Ge(1) bond length is 2.45 Å. The Sn(1)-Br(1) bond length is 1.77 Å. The Sn(1)-Br(2) bond length is 2.29 Å. Ge(1) is bonded in a single-bond geometry to one Sn(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a water-like geometry to one Sn(1) and one Br(2) atom. The Br(1)-Br(2) bond length is 1.16 Å. In the second Br site, Br(2) is bonded in a distorted single-bond geometry to one Sn(1) and one Br(1) atom.