data_SrBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.02
_cell_length_b   10.02
_cell_length_c   6.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   153.81
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrBr2
_chemical_formula_sum   'Sr2 Br4'
_cell_volume   269.41
_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
  Sr  Sr4  1  0.27  0.3  0.56  1.0
  Sr  Sr5  1  0.27  0.7  0.52  1.0
  Br  Br0  1  0.27  0.84  0.56  1.0
  Br  Br1  1  0.27  0.7  0.56  1.0
  Br  Br2  1  0.27  0.3  0.52  1.0
  Br  Br3  1  0.27  0.16  0.52  1.0

data_SrBr2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.54
_cell_length_b   6.08
_cell_length_c   10.02
_cell_angle_alpha   90.0
_cell_angle_beta   103.09
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   SrBr2
_chemical_formula_sum   'Sr2 Br4'
_cell_volume   269.41
_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
  Sr  Sr0  2  0.3  0.98  0.8  1.0
  Br  Br1  2  0.16  0.02  0.66  1.0
  Br  Br2  2  0.3  0.02  0.8  1.0

Sr Sr Br Br Br Br
Sr Sr Br Br Br Br 0 4 o o o 0 5 o o o 1 3 o o o 1 2 o o o 2 3 o o o 4 5 o o o 
SrBr2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two SrBr2 clusters. Sr(1) is bonded in a single-bond geometry to one Br(1) and one Br(2) atom. The Sr(1)-Br(1) bond length is 1.43 Å. The Sr(1)-Br(2) bond length is 0.25 Å. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted single-bond geometry to one Sr(1) atom. In the second Br site, Br(2) is bonded in a single-bond geometry to one Sr(1) atom.