data_Sr2AsBr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.56
_cell_length_b   4.56
_cell_length_c   6.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2AsBr
_chemical_formula_sum   'Sr2 As1 Br1'
_cell_volume   129.55
_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
  Sr  Sr2  1  0.0  0.0  0.12  1.0
  Sr  Sr3  1  0.28  0.28  0.0  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  Br  Br1  1  0.28  0.28  0.12  1.0

data_Sr2AsBr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.44
_cell_length_b   6.44
_cell_length_c   6.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2AsBr
_chemical_formula_sum   'Sr4 As2 Br2'
_cell_volume   259.11
_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
  Sr  Sr0  2  0.0  0.0  0.12  1.0
  Sr  Sr1  2  0.28  0.0  0.0  1.0
  As  As2  2  0.0  0.0  0.0  1.0
  Br  Br3  2  0.28  0.0  0.12  1.0

Sr Sr As Br
SrAsSrBr crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrAs clusters and two SrBr clusters. In each SrAs cluster, Sr(1) is bonded in a single-bond geometry to one As(1) atom. The Sr(1)-As(1) bond length is 0.75 Å. As(1) is bonded in a single-bond geometry to one Sr(1) atom. In each SrBr cluster, Sr(2) is bonded in a single-bond geometry to one Br(1) atom. The Sr(2)-Br(1) bond length is 0.75 Å. Br(1) is bonded in a single-bond geometry to one Sr(2) atom.