The structure described by Sr5Al2F16 crystallizes in the orthorhombic Ccce space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), and four equivalent F(4) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(4) atoms. In the third Sr site, Sr(3) is bonded to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms to form distorted SrF8 hexagonal bipyramids that share corners with two equivalent Al(1)F6 octahedra and edges with two equivalent Al(1)F6 octahedra. The corner-sharing octahedral tilt angles are 59°. Al(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form AlF6 octahedra that share corners with two equivalent Sr(3)F8 hexagonal bipyramids and edges with two equivalent Sr(3)F8 hexagonal bipyramids. There are four inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(3), and one Al(1) atom. In the second F site, F(3) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(3), and one Al(1) atom. In the third F site, F(4) is bonded to one Sr(2), one Sr(3), and two equivalent Sr(1) atoms to form a mixture of corner and edge-sharing FSr4 tetrahedra. In the fourth F site, F(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one Al(1) atom. is represented by the CIF card [CIF]
data_Sr5Al2F16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.360
_cell_length_b   7.360
_cell_length_c   14.304
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   117.937
_symmetry_Int_Tables_number   1
_cell_volume   684.617
_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  0.000  0.000  0.718  1.0
  Sr  Sr1  1  0.000  0.000  0.282  1.0
  Sr  Sr2  1  0.500  0.500  0.782  1.0
  Sr  Sr3  1  0.500  0.500  0.218  1.0
  Sr  Sr4  1  0.500  0.500  0.500  1.0
  Sr  Sr5  1  0.000  0.000  0.000  1.0
  Sr  Sr6  1  0.000  0.500  0.627  1.0
  Sr  Sr7  1  0.500  0.000  0.373  1.0
  Sr  Sr8  1  0.500  0.000  0.873  1.0
  Sr  Sr9  1  0.000  0.500  0.127  1.0
  Al  Al10  1  0.500  0.000  0.622  1.0
  Al  Al11  1  0.000  0.500  0.378  1.0
  Al  Al12  1  0.000  0.500  0.878  1.0
  Al  Al13  1  0.500  0.000  0.122  1.0
  F  F14  1  0.518  0.181  0.713  1.0
  F  F15  1  0.482  0.819  0.713  1.0
  F  F16  1  0.181  0.518  0.287  1.0
  F  F17  1  0.819  0.482  0.287  1.0
  F  F18  1  0.982  0.319  0.787  1.0
  F  F19  1  0.018  0.681  0.787  1.0
  F  F20  1  0.319  0.982  0.213  1.0
  F  F21  1  0.681  0.018  0.213  1.0
  F  F22  1  0.216  0.882  0.622  1.0
  F  F23  1  0.784  0.118  0.622  1.0
  F  F24  1  0.882  0.216  0.378  1.0
  F  F25  1  0.118  0.784  0.378  1.0
  F  F26  1  0.284  0.618  0.878  1.0
  F  F27  1  0.716  0.382  0.878  1.0
  F  F28  1  0.669  0.000  0.030  1.0
  F  F29  1  0.331  1.000  0.030  1.0
  F  F30  1  0.000  0.669  0.970  1.0
  F  F31  1  1.000  0.331  0.970  1.0
  F  F32  1  0.831  0.500  0.470  1.0
  F  F33  1  0.169  0.500  0.470  1.0
  F  F34  1  0.500  0.831  0.530  1.0
  F  F35  1  0.500  0.169  0.530  1.0
  F  F36  1  0.863  0.758  0.146  1.0
  F  F37  1  0.137  0.242  0.146  1.0
  F  F38  1  0.758  0.863  0.854  1.0
  F  F39  1  0.242  0.137  0.854  1.0
  F  F40  1  0.637  0.742  0.354  1.0
  F  F41  1  0.363  0.258  0.354  1.0
  F  F42  1  0.742  0.637  0.646  1.0
  F  F43  1  0.258  0.363  0.646  1.0
  F  F44  1  0.382  0.716  0.122  1.0
  F  F45  1  0.618  0.284  0.122  1.0
[/CIF]
.
The structure described by Sr5Al2F16 crystallizes in the orthorhombic Ccce space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), and four equivalent F(4) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(4) atoms. In the third Sr site, Sr(3) is bonded to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms to form distorted SrF8 hexagonal bipyramids that share corners with two equivalent Al(1)F6 octahedra and edges with two equivalent Al(1)F6 octahedra. The corner-sharing octahedral tilt angles are 59°. Al(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form AlF6 octahedra that share corners with two equivalent Sr(3)F8 hexagonal bipyramids and edges with two equivalent Sr(3)F8 hexagonal bipyramids. There are four inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(3), and one Al(1) atom. In the second F site, F(3) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(3), and one Al(1) atom. In the third F site, F(4) is bonded to one Sr(2), one Sr(3), and two equivalent Sr(1) atoms to form a mixture of corner and edge-sharing FSr4 tetrahedra. In the fourth F site, F(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one Al(1) atom. is represented by the CIF card [CIF]
data_Sr5Al2F16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.360
_cell_length_b   7.360
_cell_length_c   14.304
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   117.937
_symmetry_Int_Tables_number   1
_cell_volume   684.617
_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  0.000  0.000  0.718  1.0
  Sr  Sr1  1  0.000  0.000  0.282  1.0
  Sr  Sr2  1  0.500  0.500  0.782  1.0
  Sr  Sr3  1  0.500  0.500  0.218  1.0
  Sr  Sr4  1  0.500  0.500  0.500  1.0
  Sr  Sr5  1  0.000  0.000  0.000  1.0
  Sr  Sr6  1  0.000  0.500  0.627  1.0
  Sr  Sr7  1  0.500  0.000  0.373  1.0
  Sr  Sr8  1  0.500  0.000  0.873  1.0
  Sr  Sr9  1  0.000  0.500  0.127  1.0
  Al  Al10  1  0.500  0.000  0.622  1.0
  Al  Al11  1  0.000  0.500  0.378  1.0
  Al  Al12  1  0.000  0.500  0.878  1.0
  Al  Al13  1  0.500  0.000  0.122  1.0
  F  F14  1  0.518  0.181  0.713  1.0
  F  F15  1  0.482  0.819  0.713  1.0
  F  F16  1  0.181  0.518  0.287  1.0
  F  F17  1  0.819  0.482  0.287  1.0
  F  F18  1  0.982  0.319  0.787  1.0
  F  F19  1  0.018  0.681  0.787  1.0
  F  F20  1  0.319  0.982  0.213  1.0
  F  F21  1  0.681  0.018  0.213  1.0
  F  F22  1  0.216  0.882  0.622  1.0
  F  F23  1  0.784  0.118  0.622  1.0
  F  F24  1  0.882  0.216  0.378  1.0
  F  F25  1  0.118  0.784  0.378  1.0
  F  F26  1  0.284  0.618  0.878  1.0
  F  F27  1  0.716  0.382  0.878  1.0
  F  F28  1  0.669  0.000  0.030  1.0
  F  F29  1  0.331  1.000  0.030  1.0
  F  F30  1  0.000  0.669  0.970  1.0
  F  F31  1  1.000  0.331  0.970  1.0
  F  F32  1  0.831  0.500  0.470  1.0
  F  F33  1  0.169  0.500  0.470  1.0
  F  F34  1  0.500  0.831  0.530  1.0
  F  F35  1  0.500  0.169  0.530  1.0
  F  F36  1  0.863  0.758  0.146  1.0
  F  F37  1  0.137  0.242  0.146  1.0
  F  F38  1  0.758  0.863  0.854  1.0
  F  F39  1  0.242  0.137  0.854  1.0
  F  F40  1  0.637  0.742  0.354  1.0
  F  F41  1  0.363  0.258  0.354  1.0
  F  F42  1  0.742  0.637  0.646  1.0
  F  F43  1  0.258  0.363  0.646  1.0
  F  F44  1  0.382  0.716  0.122  1.0
  F  F45  1  0.618  0.284  0.122  1.0
[/CIF]
.