The structure described by Sr5(Br4Cl)2 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 four equivalent Br(1) and four equivalent Br(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to three equivalent Br(1), three equivalent Br(2), one Cl(1), and one Cl(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form BrSr4 trigonal pyramids that share  a cornercorner with one Cl(2)Sr4 tetrahedra, corners with three equivalent Cl(1)Sr4 tetrahedra, corners with three equivalent Br(1)Sr4 trigonal pyramids,  an edgeedge with one Cl(2)Sr4 tetrahedra, and edges with three equivalent Br(1)Sr4 trigonal pyramids. In the second Br site, Br(2) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1) and three equivalent Sr(2) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to four equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with twelve equivalent Br(1)Sr4 trigonal pyramids and edges with two equivalent Cl(2)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with four equivalent Br(1)Sr4 trigonal pyramids, edges with two equivalent Cl(1)Sr4 tetrahedra, and edges with four equivalent Br(1)Sr4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5(Br4Cl)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.527
_cell_length_b   11.527
_cell_length_c   7.057
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   937.621
_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  Sr0  1  0.500  0.000  0.142  1.0
  Sr  Sr1  1  0.000  0.500  0.858  1.0
  Sr  Sr2  1  0.845  0.857  0.751  1.0
  Sr  Sr3  1  0.357  0.655  0.751  1.0
  Sr  Sr4  1  0.643  0.345  0.751  1.0
  Sr  Sr5  1  0.155  0.143  0.751  1.0
  Sr  Sr6  1  0.655  0.643  0.249  1.0
  Sr  Sr7  1  0.143  0.845  0.249  1.0
  Sr  Sr8  1  0.857  0.155  0.249  1.0
  Sr  Sr9  1  0.345  0.357  0.249  1.0
  Br  Br10  1  0.710  0.090  0.894  1.0
  Br  Br11  1  0.590  0.790  0.894  1.0
  Br  Br12  1  0.410  0.210  0.894  1.0
  Br  Br13  1  0.290  0.910  0.894  1.0
  Br  Br14  1  0.790  0.410  0.106  1.0
  Br  Br15  1  0.910  0.710  0.106  1.0
  Br  Br16  1  0.215  0.408  0.627  1.0
  Br  Br17  1  0.908  0.285  0.627  1.0
  Br  Br18  1  0.092  0.715  0.627  1.0
  Br  Br19  1  0.785  0.592  0.627  1.0
  Br  Br20  1  0.285  0.092  0.373  1.0
  Br  Br21  1  0.592  0.215  0.373  1.0
  Br  Br22  1  0.408  0.785  0.373  1.0
  Br  Br23  1  0.715  0.908  0.373  1.0
  Br  Br24  1  0.210  0.590  0.106  1.0
  Br  Br25  1  0.090  0.290  0.106  1.0
  Cl  Cl26  1  0.000  0.000  0.500  1.0
  Cl  Cl27  1  0.500  0.500  0.500  1.0
  Cl  Cl28  1  0.000  0.000  0.000  1.0
  Cl  Cl29  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by Sr5(Br4Cl)2 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 four equivalent Br(1) and four equivalent Br(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to three equivalent Br(1), three equivalent Br(2), one Cl(1), and one Cl(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded to one Sr(1) and three equivalent Sr(2) atoms to form BrSr4 trigonal pyramids that share  a cornercorner with one Cl(2)Sr4 tetrahedra, corners with three equivalent Cl(1)Sr4 tetrahedra, corners with three equivalent Br(1)Sr4 trigonal pyramids,  an edgeedge with one Cl(2)Sr4 tetrahedra, and edges with three equivalent Br(1)Sr4 trigonal pyramids. In the second Br site, Br(2) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1) and three equivalent Sr(2) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to four equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with twelve equivalent Br(1)Sr4 trigonal pyramids and edges with two equivalent Cl(2)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with four equivalent Br(1)Sr4 trigonal pyramids, edges with two equivalent Cl(1)Sr4 tetrahedra, and edges with four equivalent Br(1)Sr4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr5(Br4Cl)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.527
_cell_length_b   11.527
_cell_length_c   7.057
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   937.621
_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  Sr0  1  0.500  0.000  0.142  1.0
  Sr  Sr1  1  0.000  0.500  0.858  1.0
  Sr  Sr2  1  0.845  0.857  0.751  1.0
  Sr  Sr3  1  0.357  0.655  0.751  1.0
  Sr  Sr4  1  0.643  0.345  0.751  1.0
  Sr  Sr5  1  0.155  0.143  0.751  1.0
  Sr  Sr6  1  0.655  0.643  0.249  1.0
  Sr  Sr7  1  0.143  0.845  0.249  1.0
  Sr  Sr8  1  0.857  0.155  0.249  1.0
  Sr  Sr9  1  0.345  0.357  0.249  1.0
  Br  Br10  1  0.710  0.090  0.894  1.0
  Br  Br11  1  0.590  0.790  0.894  1.0
  Br  Br12  1  0.410  0.210  0.894  1.0
  Br  Br13  1  0.290  0.910  0.894  1.0
  Br  Br14  1  0.790  0.410  0.106  1.0
  Br  Br15  1  0.910  0.710  0.106  1.0
  Br  Br16  1  0.215  0.408  0.627  1.0
  Br  Br17  1  0.908  0.285  0.627  1.0
  Br  Br18  1  0.092  0.715  0.627  1.0
  Br  Br19  1  0.785  0.592  0.627  1.0
  Br  Br20  1  0.285  0.092  0.373  1.0
  Br  Br21  1  0.592  0.215  0.373  1.0
  Br  Br22  1  0.408  0.785  0.373  1.0
  Br  Br23  1  0.715  0.908  0.373  1.0
  Br  Br24  1  0.210  0.590  0.106  1.0
  Br  Br25  1  0.090  0.290  0.106  1.0
  Cl  Cl26  1  0.000  0.000  0.500  1.0
  Cl  Cl27  1  0.500  0.500  0.500  1.0
  Cl  Cl28  1  0.000  0.000  0.000  1.0
  Cl  Cl29  1  0.500  0.500  0.000  1.0
[/CIF]
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