The structure described by SrBr2 crystallizes in the tetragonal P4/n space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one Br(1), one Br(4), three equivalent Br(2), and three equivalent Br(3) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent Br(2) and four equivalent Br(3) atoms. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 tetrahedra. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to one Sr(2) and three equivalent Sr(1) atoms. In the third Br site, Br(3) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 trigonal pyramids. In the fourth Br site, Br(4) is bonded to four equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 tetrahedra. is represented by the CIF card [CIF]
data_SrBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.197
_cell_length_b   11.665
_cell_length_c   11.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   979.310
_cell_formula_units_Z   10
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  Sr0  1  0.252  0.085  0.604  1.0
  Sr  Sr1  1  0.252  0.604  0.415  1.0
  Sr  Sr2  1  0.252  0.896  0.085  1.0
  Sr  Sr3  1  0.252  0.415  0.896  1.0
  Sr  Sr4  1  0.349  0.250  0.250  1.0
  Sr  Sr5  1  0.651  0.750  0.750  1.0
  Sr  Sr6  1  0.748  0.104  0.915  1.0
  Sr  Sr7  1  0.748  0.396  0.585  1.0
  Sr  Sr8  1  0.748  0.585  0.104  1.0
  Sr  Sr9  1  0.748  0.915  0.396  1.0
  Br  Br10  1  0.000  0.250  0.750  1.0
  Br  Br11  1  0.000  0.750  0.250  1.0
  Br  Br12  1  0.123  0.040  0.348  1.0
  Br  Br13  1  0.123  0.152  0.040  1.0
  Br  Br14  1  0.123  0.348  0.460  1.0
  Br  Br15  1  0.123  0.460  0.152  1.0
  Br  Br16  1  0.403  0.543  0.661  1.0
  Br  Br17  1  0.403  0.661  0.957  1.0
  Br  Br18  1  0.403  0.839  0.543  1.0
  Br  Br19  1  0.403  0.957  0.839  1.0
  Br  Br20  1  0.500  0.250  0.750  1.0
  Br  Br21  1  0.500  0.750  0.250  1.0
  Br  Br22  1  0.597  0.043  0.161  1.0
  Br  Br23  1  0.597  0.161  0.457  1.0
  Br  Br24  1  0.597  0.339  0.043  1.0
  Br  Br25  1  0.597  0.457  0.339  1.0
  Br  Br26  1  0.877  0.540  0.848  1.0
  Br  Br27  1  0.877  0.652  0.540  1.0
  Br  Br28  1  0.877  0.848  0.960  1.0
  Br  Br29  1  0.877  0.960  0.652  1.0
[/CIF]
.
The structure described by SrBr2 crystallizes in the tetragonal P4/n space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one Br(1), one Br(4), three equivalent Br(2), and three equivalent Br(3) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent Br(2) and four equivalent Br(3) atoms. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 tetrahedra. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to one Sr(2) and three equivalent Sr(1) atoms. In the third Br site, Br(3) is bonded to one Sr(2) and three equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 trigonal pyramids. In the fourth Br site, Br(4) is bonded to four equivalent Sr(1) atoms to form a mixture of corner and edge-sharing BrSr4 tetrahedra. is represented by the CIF card [CIF]
data_SrBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.197
_cell_length_b   11.665
_cell_length_c   11.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   979.310
_cell_formula_units_Z   10
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  Sr0  1  0.252  0.085  0.604  1.0
  Sr  Sr1  1  0.252  0.604  0.415  1.0
  Sr  Sr2  1  0.252  0.896  0.085  1.0
  Sr  Sr3  1  0.252  0.415  0.896  1.0
  Sr  Sr4  1  0.349  0.250  0.250  1.0
  Sr  Sr5  1  0.651  0.750  0.750  1.0
  Sr  Sr6  1  0.748  0.104  0.915  1.0
  Sr  Sr7  1  0.748  0.396  0.585  1.0
  Sr  Sr8  1  0.748  0.585  0.104  1.0
  Sr  Sr9  1  0.748  0.915  0.396  1.0
  Br  Br10  1  0.000  0.250  0.750  1.0
  Br  Br11  1  0.000  0.750  0.250  1.0
  Br  Br12  1  0.123  0.040  0.348  1.0
  Br  Br13  1  0.123  0.152  0.040  1.0
  Br  Br14  1  0.123  0.348  0.460  1.0
  Br  Br15  1  0.123  0.460  0.152  1.0
  Br  Br16  1  0.403  0.543  0.661  1.0
  Br  Br17  1  0.403  0.661  0.957  1.0
  Br  Br18  1  0.403  0.839  0.543  1.0
  Br  Br19  1  0.403  0.957  0.839  1.0
  Br  Br20  1  0.500  0.250  0.750  1.0
  Br  Br21  1  0.500  0.750  0.250  1.0
  Br  Br22  1  0.597  0.043  0.161  1.0
  Br  Br23  1  0.597  0.161  0.457  1.0
  Br  Br24  1  0.597  0.339  0.043  1.0
  Br  Br25  1  0.597  0.457  0.339  1.0
  Br  Br26  1  0.877  0.540  0.848  1.0
  Br  Br27  1  0.877  0.652  0.540  1.0
  Br  Br28  1  0.877  0.848  0.960  1.0
  Br  Br29  1  0.877  0.960  0.652  1.0
[/CIF]
.