The crystal structure described by Sr5Al3F19 crystallizes in the tetragonal I4/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one F(3), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(3), one F(5), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(5) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in an octahedral geometry to one F(5), one F(7), two equivalent F(1), and two equivalent F(6) atoms. In the second Al site, Al(2) is bonded to one F(4), one F(8), and four equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 1-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. In the third F site, F(8) is bonded in a linear geometry to two equivalent Al(2) atoms. In the fourth F site, F(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one Al(2) atom. In the fifth F site, F(3) is bonded to one Sr(1), one Sr(2), and two equivalent Sr(3) atoms to form a mixture of distorted corner and edge-sharing FSr4 tetrahedra. In the sixth F site, F(4) is bonded in a linear geometry to two equivalent Al(2) atoms. In the seventh F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(3), and one Al(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. is represented by the CIF card [CIF]
data_Sr5Al3F19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.751
_cell_length_b   10.751
_cell_length_c   10.751
_cell_angle_alpha   96.522
_cell_angle_beta   96.522
_cell_angle_gamma   140.608
_symmetry_Int_Tables_number   1
_cell_volume   742.382
_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  0.781  0.054  0.835  1.0
  Sr  Sr1  1  0.219  0.946  0.165  1.0
  Sr  Sr2  1  0.054  0.219  0.273  1.0
  Sr  Sr3  1  0.946  0.781  0.727  1.0
  Sr  Sr4  1  0.578  0.252  0.830  1.0
  Sr  Sr5  1  0.422  0.748  0.170  1.0
  Sr  Sr6  1  0.252  0.422  0.674  1.0
  Sr  Sr7  1  0.748  0.578  0.326  1.0
  Sr  Sr8  1  0.750  0.250  0.500  1.0
  Sr  Sr9  1  0.250  0.750  0.500  1.0
  Al  Al10  1  0.823  0.341  0.164  1.0
  Al  Al11  1  0.177  0.659  0.836  1.0
  Al  Al12  1  0.341  0.177  0.517  1.0
  Al  Al13  1  0.659  0.823  0.483  1.0
  Al  Al14  1  0.747  0.747  0.000  1.0
  Al  Al15  1  0.253  0.253  0.000  1.0
  F  F16  1  0.425  0.777  0.857  1.0
  F  F17  1  0.575  0.223  0.143  1.0
  F  F18  1  0.921  0.568  0.143  1.0
  F  F19  1  0.777  0.921  0.352  1.0
  F  F20  1  0.079  0.432  0.857  1.0
  F  F21  1  0.223  0.079  0.648  1.0
  F  F22  1  0.568  0.425  0.648  1.0
  F  F23  1  0.432  0.575  0.352  1.0
  F  F24  1  0.712  0.877  0.071  1.0
  F  F25  1  0.288  0.123  0.929  1.0
  F  F26  1  0.806  0.641  0.929  1.0
  F  F27  1  0.877  0.806  0.165  1.0
  F  F28  1  0.194  0.359  0.071  1.0
  F  F29  1  0.123  0.194  0.835  1.0
  F  F30  1  0.641  0.712  0.835  1.0
  F  F31  1  0.359  0.288  0.165  1.0
  F  F32  1  0.617  0.076  0.694  1.0
  F  F33  1  0.383  0.924  0.306  1.0
  F  F34  1  0.076  0.383  0.459  1.0
  F  F35  1  0.924  0.617  0.541  1.0
  F  F36  1  0.000  0.000  0.000  1.0
  F  F37  1  0.889  0.452  0.340  1.0
  F  F38  1  0.111  0.548  0.660  1.0
  F  F39  1  0.452  0.111  0.563  1.0
  F  F40  1  0.548  0.889  0.437  1.0
  F  F41  1  0.733  0.124  0.206  1.0
  F  F42  1  0.267  0.876  0.794  1.0
  F  F43  1  0.918  0.527  0.794  1.0
  F  F44  1  0.124  0.918  0.392  1.0
  F  F45  1  0.082  0.473  0.206  1.0
  F  F46  1  0.876  0.082  0.609  1.0
  F  F47  1  0.527  0.733  0.609  1.0
  F  F48  1  0.473  0.267  0.392  1.0
  F  F49  1  0.757  0.233  0.990  1.0
  F  F50  1  0.243  0.767  0.010  1.0
  F  F51  1  0.233  0.243  0.477  1.0
  F  F52  1  0.767  0.757  0.523  1.0
  F  F53  1  0.500  0.500  0.000  1.0
[/CIF]
.
The crystal structure described by Sr5Al3F19 crystallizes in the tetragonal I4/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one F(3), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(3), one F(5), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(5) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in an octahedral geometry to one F(5), one F(7), two equivalent F(1), and two equivalent F(6) atoms. In the second Al site, Al(2) is bonded to one F(4), one F(8), and four equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 1-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. In the third F site, F(8) is bonded in a linear geometry to two equivalent Al(2) atoms. In the fourth F site, F(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one Al(2) atom. In the fifth F site, F(3) is bonded to one Sr(1), one Sr(2), and two equivalent Sr(3) atoms to form a mixture of distorted corner and edge-sharing FSr4 tetrahedra. In the sixth F site, F(4) is bonded in a linear geometry to two equivalent Al(2) atoms. In the seventh F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(3), and one Al(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Al(1) atom. is represented by the CIF card [CIF]
data_Sr5Al3F19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.751
_cell_length_b   10.751
_cell_length_c   10.751
_cell_angle_alpha   96.522
_cell_angle_beta   96.522
_cell_angle_gamma   140.608
_symmetry_Int_Tables_number   1
_cell_volume   742.382
_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  0.781  0.054  0.835  1.0
  Sr  Sr1  1  0.219  0.946  0.165  1.0
  Sr  Sr2  1  0.054  0.219  0.273  1.0
  Sr  Sr3  1  0.946  0.781  0.727  1.0
  Sr  Sr4  1  0.578  0.252  0.830  1.0
  Sr  Sr5  1  0.422  0.748  0.170  1.0
  Sr  Sr6  1  0.252  0.422  0.674  1.0
  Sr  Sr7  1  0.748  0.578  0.326  1.0
  Sr  Sr8  1  0.750  0.250  0.500  1.0
  Sr  Sr9  1  0.250  0.750  0.500  1.0
  Al  Al10  1  0.823  0.341  0.164  1.0
  Al  Al11  1  0.177  0.659  0.836  1.0
  Al  Al12  1  0.341  0.177  0.517  1.0
  Al  Al13  1  0.659  0.823  0.483  1.0
  Al  Al14  1  0.747  0.747  0.000  1.0
  Al  Al15  1  0.253  0.253  0.000  1.0
  F  F16  1  0.425  0.777  0.857  1.0
  F  F17  1  0.575  0.223  0.143  1.0
  F  F18  1  0.921  0.568  0.143  1.0
  F  F19  1  0.777  0.921  0.352  1.0
  F  F20  1  0.079  0.432  0.857  1.0
  F  F21  1  0.223  0.079  0.648  1.0
  F  F22  1  0.568  0.425  0.648  1.0
  F  F23  1  0.432  0.575  0.352  1.0
  F  F24  1  0.712  0.877  0.071  1.0
  F  F25  1  0.288  0.123  0.929  1.0
  F  F26  1  0.806  0.641  0.929  1.0
  F  F27  1  0.877  0.806  0.165  1.0
  F  F28  1  0.194  0.359  0.071  1.0
  F  F29  1  0.123  0.194  0.835  1.0
  F  F30  1  0.641  0.712  0.835  1.0
  F  F31  1  0.359  0.288  0.165  1.0
  F  F32  1  0.617  0.076  0.694  1.0
  F  F33  1  0.383  0.924  0.306  1.0
  F  F34  1  0.076  0.383  0.459  1.0
  F  F35  1  0.924  0.617  0.541  1.0
  F  F36  1  0.000  0.000  0.000  1.0
  F  F37  1  0.889  0.452  0.340  1.0
  F  F38  1  0.111  0.548  0.660  1.0
  F  F39  1  0.452  0.111  0.563  1.0
  F  F40  1  0.548  0.889  0.437  1.0
  F  F41  1  0.733  0.124  0.206  1.0
  F  F42  1  0.267  0.876  0.794  1.0
  F  F43  1  0.918  0.527  0.794  1.0
  F  F44  1  0.124  0.918  0.392  1.0
  F  F45  1  0.082  0.473  0.206  1.0
  F  F46  1  0.876  0.082  0.609  1.0
  F  F47  1  0.527  0.733  0.609  1.0
  F  F48  1  0.473  0.267  0.392  1.0
  F  F49  1  0.757  0.233  0.990  1.0
  F  F50  1  0.243  0.767  0.010  1.0
  F  F51  1  0.233  0.243  0.477  1.0
  F  F52  1  0.767  0.757  0.523  1.0
  F  F53  1  0.500  0.500  0.000  1.0
[/CIF]
.