The structure described by KSr2Br5 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent Br(2), two equivalent Br(3), two equivalent Br(4), and two equivalent Br(5) atoms. In the second Sr site, Sr(2) is bonded to one Br(2), one Br(3), one Br(4), two equivalent Br(1), and two equivalent Br(5) atoms to form distorted edge-sharing SrBr7 pentagonal bipyramids. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded to two equivalent K(1) and two equivalent Sr(2) atoms to form distorted BrK2Sr2 tetrahedra that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with four equivalent Br(5)Sr4 tetrahedra, corners with two equivalent Br(2)K2Sr3 trigonal bipyramids, corners with two equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid,  an edgeedge with one Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and edges with two equivalent Br(3)K2Sr3 trigonal bipyramids. In the second Br site, Br(2) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form distorted BrK2Sr3 trigonal bipyramids that share corners with five equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(5)Sr4 tetrahedra,  a cornercorner with one Br(3)K2Sr3 trigonal bipyramid, corners with four equivalent Br(2)K2Sr3 trigonal bipyramids, edges with two equivalent Br(4)K2Sr3 square pyramids, edges with two equivalent Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(5)Sr4 tetrahedra, and edges with four equivalent Br(3)K2Sr3 trigonal bipyramids. In the third Br site, Br(3) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form BrK2Sr3 trigonal bipyramids that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(5)Sr4 tetrahedra,  a cornercorner with one Br(2)K2Sr3 trigonal bipyramid, corners with four equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid, edges with two equivalent Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(5)Sr4 tetrahedra, edges with four equivalent Br(2)K2Sr3 trigonal bipyramids, and  a faceface with one Br(4)K2Sr3 square pyramid. In the fourth Br site, Br(4) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form BrK2Sr3 square pyramids that share corners with four equivalent Br(1)K2Sr2 tetrahedra, corners with four equivalent Br(5)Sr4 tetrahedra, corners with four equivalent Br(3)K2Sr3 trigonal bipyramids, corners with five equivalent Br(2)K2Sr3 trigonal bipyramids, edges with two equivalent Br(4)K2Sr3 square pyramids,  an edgeedge with one Br(1)K2Sr2 tetrahedra,  an edgeedge with one Br(5)Sr4 tetrahedra,  an edgeedge with one Br(3)K2Sr3 trigonal bipyramid, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and  a faceface with one Br(3)K2Sr3 trigonal bipyramid. In the fifth Br site, Br(5) is bonded to two equivalent Sr(1) and two equivalent Sr(2) atoms to form BrSr4 tetrahedra that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(5)Sr4 tetrahedra, corners with four equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(2)K2Sr3 trigonal bipyramids, corners with two equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid,  an edgeedge with one Br(5)Sr4 tetrahedra, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and edges with two equivalent Br(3)K2Sr3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSr2Br5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.351
_cell_length_b   9.320
_cell_length_c   13.421
_cell_angle_alpha   89.922
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1044.597
_cell_formula_units_Z   4
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
  K  K0  1  0.463  0.494  0.828  1.0
  K  K1  1  0.537  0.506  0.172  1.0
  K  K2  1  0.963  0.506  0.672  1.0
  K  K3  1  0.037  0.494  0.328  1.0
  Sr  Sr4  1  0.478  0.999  0.822  1.0
  Sr  Sr5  1  0.522  0.001  0.178  1.0
  Sr  Sr6  1  0.978  0.001  0.678  1.0
  Sr  Sr7  1  0.022  0.999  0.322  1.0
  Sr  Sr8  1  0.430  0.749  0.506  1.0
  Sr  Sr9  1  0.570  0.251  0.494  1.0
  Sr  Sr10  1  0.930  0.251  0.994  1.0
  Sr  Sr11  1  0.070  0.749  0.006  1.0
  Br  Br12  1  0.332  0.463  0.593  1.0
  Br  Br13  1  0.668  0.537  0.407  1.0
  Br  Br14  1  0.832  0.537  0.907  1.0
  Br  Br15  1  0.168  0.463  0.093  1.0
  Br  Br16  1  0.670  0.780  0.683  1.0
  Br  Br17  1  0.330  0.220  0.317  1.0
  Br  Br18  1  0.170  0.220  0.817  1.0
  Br  Br19  1  0.830  0.780  0.183  1.0
  Br  Br20  1  0.194  0.768  0.784  1.0
  Br  Br21  1  0.806  0.232  0.216  1.0
  Br  Br22  1  0.694  0.232  0.716  1.0
  Br  Br23  1  0.306  0.768  0.284  1.0
  Br  Br24  1  0.044  0.779  0.503  1.0
  Br  Br25  1  0.956  0.221  0.497  1.0
  Br  Br26  1  0.544  0.221  0.997  1.0
  Br  Br27  1  0.456  0.779  0.003  1.0
  Br  Br28  1  0.839  0.961  0.900  1.0
  Br  Br29  1  0.161  0.039  0.100  1.0
  Br  Br30  1  0.339  0.039  0.600  1.0
  Br  Br31  1  0.661  0.961  0.400  1.0
[/CIF]
.
The structure described by KSr2Br5 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent Br(2), two equivalent Br(3), two equivalent Br(4), and two equivalent Br(5) atoms. In the second Sr site, Sr(2) is bonded to one Br(2), one Br(3), one Br(4), two equivalent Br(1), and two equivalent Br(5) atoms to form distorted edge-sharing SrBr7 pentagonal bipyramids. There are five inequivalent Br sites. In the first Br site, Br(1) is bonded to two equivalent K(1) and two equivalent Sr(2) atoms to form distorted BrK2Sr2 tetrahedra that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with four equivalent Br(5)Sr4 tetrahedra, corners with two equivalent Br(2)K2Sr3 trigonal bipyramids, corners with two equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid,  an edgeedge with one Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and edges with two equivalent Br(3)K2Sr3 trigonal bipyramids. In the second Br site, Br(2) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form distorted BrK2Sr3 trigonal bipyramids that share corners with five equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(5)Sr4 tetrahedra,  a cornercorner with one Br(3)K2Sr3 trigonal bipyramid, corners with four equivalent Br(2)K2Sr3 trigonal bipyramids, edges with two equivalent Br(4)K2Sr3 square pyramids, edges with two equivalent Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(5)Sr4 tetrahedra, and edges with four equivalent Br(3)K2Sr3 trigonal bipyramids. In the third Br site, Br(3) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form BrK2Sr3 trigonal bipyramids that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(5)Sr4 tetrahedra,  a cornercorner with one Br(2)K2Sr3 trigonal bipyramid, corners with four equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid, edges with two equivalent Br(1)K2Sr2 tetrahedra, edges with two equivalent Br(5)Sr4 tetrahedra, edges with four equivalent Br(2)K2Sr3 trigonal bipyramids, and  a faceface with one Br(4)K2Sr3 square pyramid. In the fourth Br site, Br(4) is bonded to two equivalent K(1), one Sr(2), and two equivalent Sr(1) atoms to form BrK2Sr3 square pyramids that share corners with four equivalent Br(1)K2Sr2 tetrahedra, corners with four equivalent Br(5)Sr4 tetrahedra, corners with four equivalent Br(3)K2Sr3 trigonal bipyramids, corners with five equivalent Br(2)K2Sr3 trigonal bipyramids, edges with two equivalent Br(4)K2Sr3 square pyramids,  an edgeedge with one Br(1)K2Sr2 tetrahedra,  an edgeedge with one Br(5)Sr4 tetrahedra,  an edgeedge with one Br(3)K2Sr3 trigonal bipyramid, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and  a faceface with one Br(3)K2Sr3 trigonal bipyramid. In the fifth Br site, Br(5) is bonded to two equivalent Sr(1) and two equivalent Sr(2) atoms to form BrSr4 tetrahedra that share corners with four equivalent Br(4)K2Sr3 square pyramids, corners with two equivalent Br(5)Sr4 tetrahedra, corners with four equivalent Br(1)K2Sr2 tetrahedra, corners with two equivalent Br(2)K2Sr3 trigonal bipyramids, corners with two equivalent Br(3)K2Sr3 trigonal bipyramids,  an edgeedge with one Br(4)K2Sr3 square pyramid,  an edgeedge with one Br(5)Sr4 tetrahedra, edges with two equivalent Br(2)K2Sr3 trigonal bipyramids, and edges with two equivalent Br(3)K2Sr3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSr2Br5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.351
_cell_length_b   9.320
_cell_length_c   13.421
_cell_angle_alpha   89.922
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1044.597
_cell_formula_units_Z   4
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
  K  K0  1  0.463  0.494  0.828  1.0
  K  K1  1  0.537  0.506  0.172  1.0
  K  K2  1  0.963  0.506  0.672  1.0
  K  K3  1  0.037  0.494  0.328  1.0
  Sr  Sr4  1  0.478  0.999  0.822  1.0
  Sr  Sr5  1  0.522  0.001  0.178  1.0
  Sr  Sr6  1  0.978  0.001  0.678  1.0
  Sr  Sr7  1  0.022  0.999  0.322  1.0
  Sr  Sr8  1  0.430  0.749  0.506  1.0
  Sr  Sr9  1  0.570  0.251  0.494  1.0
  Sr  Sr10  1  0.930  0.251  0.994  1.0
  Sr  Sr11  1  0.070  0.749  0.006  1.0
  Br  Br12  1  0.332  0.463  0.593  1.0
  Br  Br13  1  0.668  0.537  0.407  1.0
  Br  Br14  1  0.832  0.537  0.907  1.0
  Br  Br15  1  0.168  0.463  0.093  1.0
  Br  Br16  1  0.670  0.780  0.683  1.0
  Br  Br17  1  0.330  0.220  0.317  1.0
  Br  Br18  1  0.170  0.220  0.817  1.0
  Br  Br19  1  0.830  0.780  0.183  1.0
  Br  Br20  1  0.194  0.768  0.784  1.0
  Br  Br21  1  0.806  0.232  0.216  1.0
  Br  Br22  1  0.694  0.232  0.716  1.0
  Br  Br23  1  0.306  0.768  0.284  1.0
  Br  Br24  1  0.044  0.779  0.503  1.0
  Br  Br25  1  0.956  0.221  0.497  1.0
  Br  Br26  1  0.544  0.221  0.997  1.0
  Br  Br27  1  0.456  0.779  0.003  1.0
  Br  Br28  1  0.839  0.961  0.900  1.0
  Br  Br29  1  0.161  0.039  0.100  1.0
  Br  Br30  1  0.339  0.039  0.600  1.0
  Br  Br31  1  0.661  0.961  0.400  1.0
[/CIF]
.