The structure described by NaSr2CrF8 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one F(4), one F(6), one F(7), one F(8), and two equivalent F(2) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one F(3), one F(4), one F(6), one F(7), one F(8), two equivalent F(1), and two equivalent F(5) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one F(2), one F(3), one F(5), one F(7), two equivalent F(4), and two equivalent F(8) atoms. Cr(1) is bonded in an octahedral geometry to one F(1), one F(2), one F(3), one F(5), one F(6), and one F(7) atom. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Cr(1) atom. In the second F site, F(2) is bonded to two equivalent Na(1), one Sr(2), and one Cr(1) atom to form distorted FNa2SrCr tetrahedra that share corners with four equivalent F(4)NaSr3 tetrahedra and  an edgeedge with one F(2)Na2SrCr tetrahedra. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Cr(1) atom. In the fourth F site, F(4) is bonded to one Na(1), one Sr(1), and two equivalent Sr(2) atoms to form distorted FNaSr3 tetrahedra that share corners with two equivalent F(4)NaSr3 tetrahedra and corners with four equivalent F(2)Na2SrCr tetrahedra. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Na(1), one Sr(1), and one Cr(1) atom. In the seventh F site, F(7) is bonded in a 4-coordinate geometry to one Na(1), one Sr(1), one Sr(2), and one Cr(1) atom. In the eighth F site, F(8) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Sr(1), and two equivalent Sr(2) atoms. is represented by the CIF card [CIF]
data_NaSr2CrF8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.356
_cell_length_b   7.883
_cell_length_c   15.073
_cell_angle_alpha   67.797
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   699.153
_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
  Na  Na0  1  0.173  0.859  0.941  1.0
  Na  Na1  1  0.827  0.141  0.059  1.0
  Na  Na2  1  0.327  0.859  0.441  1.0
  Na  Na3  1  0.673  0.141  0.559  1.0
  Sr  Sr4  1  0.843  0.586  0.356  1.0
  Sr  Sr5  1  0.657  0.586  0.856  1.0
  Sr  Sr6  1  0.279  0.903  0.197  1.0
  Sr  Sr7  1  0.343  0.414  0.144  1.0
  Sr  Sr8  1  0.221  0.903  0.697  1.0
  Sr  Sr9  1  0.721  0.097  0.803  1.0
  Sr  Sr10  1  0.157  0.414  0.644  1.0
  Sr  Sr11  1  0.779  0.097  0.303  1.0
  Cr  Cr12  1  0.278  0.307  0.403  1.0
  Cr  Cr13  1  0.722  0.693  0.597  1.0
  Cr  Cr14  1  0.222  0.307  0.903  1.0
  Cr  Cr15  1  0.778  0.693  0.097  1.0
  F  F16  1  0.185  0.453  0.473  1.0
  F  F17  1  0.815  0.547  0.527  1.0
  F  F18  1  0.198  0.081  0.016  1.0
  F  F19  1  0.982  0.255  0.390  1.0
  F  F20  1  0.054  0.854  0.343  1.0
  F  F21  1  0.265  0.528  0.784  1.0
  F  F22  1  0.930  0.356  0.918  1.0
  F  F23  1  0.624  0.825  0.678  1.0
  F  F24  1  0.302  0.081  0.516  1.0
  F  F25  1  0.685  0.547  0.027  1.0
  F  F26  1  0.944  0.816  0.826  1.0
  F  F27  1  0.070  0.644  0.082  1.0
  F  F28  1  0.735  0.472  0.216  1.0
  F  F29  1  0.698  0.919  0.484  1.0
  F  F30  1  0.946  0.146  0.657  1.0
  F  F31  1  0.235  0.528  0.284  1.0
  F  F32  1  0.446  0.854  0.843  1.0
  F  F33  1  0.554  0.146  0.157  1.0
  F  F34  1  0.482  0.745  0.110  1.0
  F  F35  1  0.765  0.472  0.716  1.0
  F  F36  1  0.556  0.816  0.326  1.0
  F  F37  1  0.376  0.175  0.322  1.0
  F  F38  1  0.518  0.255  0.890  1.0
  F  F39  1  0.444  0.184  0.674  1.0
  F  F40  1  0.570  0.356  0.418  1.0
  F  F41  1  0.876  0.825  0.178  1.0
  F  F42  1  0.315  0.453  0.973  1.0
  F  F43  1  0.018  0.745  0.610  1.0
  F  F44  1  0.430  0.644  0.582  1.0
  F  F45  1  0.056  0.184  0.174  1.0
  F  F46  1  0.124  0.175  0.822  1.0
  F  F47  1  0.802  0.919  0.984  1.0
[/CIF]
.
The structure described by NaSr2CrF8 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one F(4), one F(6), one F(7), one F(8), and two equivalent F(2) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one F(3), one F(4), one F(6), one F(7), one F(8), two equivalent F(1), and two equivalent F(5) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one F(2), one F(3), one F(5), one F(7), two equivalent F(4), and two equivalent F(8) atoms. Cr(1) is bonded in an octahedral geometry to one F(1), one F(2), one F(3), one F(5), one F(6), and one F(7) atom. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Cr(1) atom. In the second F site, F(2) is bonded to two equivalent Na(1), one Sr(2), and one Cr(1) atom to form distorted FNa2SrCr tetrahedra that share corners with four equivalent F(4)NaSr3 tetrahedra and  an edgeedge with one F(2)Na2SrCr tetrahedra. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Cr(1) atom. In the fourth F site, F(4) is bonded to one Na(1), one Sr(1), and two equivalent Sr(2) atoms to form distorted FNaSr3 tetrahedra that share corners with two equivalent F(4)NaSr3 tetrahedra and corners with four equivalent F(2)Na2SrCr tetrahedra. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Na(1), one Sr(1), and one Cr(1) atom. In the seventh F site, F(7) is bonded in a 4-coordinate geometry to one Na(1), one Sr(1), one Sr(2), and one Cr(1) atom. In the eighth F site, F(8) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Sr(1), and two equivalent Sr(2) atoms. is represented by the CIF card [CIF]
data_NaSr2CrF8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.356
_cell_length_b   7.883
_cell_length_c   15.073
_cell_angle_alpha   67.797
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   699.153
_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
  Na  Na0  1  0.173  0.859  0.941  1.0
  Na  Na1  1  0.827  0.141  0.059  1.0
  Na  Na2  1  0.327  0.859  0.441  1.0
  Na  Na3  1  0.673  0.141  0.559  1.0
  Sr  Sr4  1  0.843  0.586  0.356  1.0
  Sr  Sr5  1  0.657  0.586  0.856  1.0
  Sr  Sr6  1  0.279  0.903  0.197  1.0
  Sr  Sr7  1  0.343  0.414  0.144  1.0
  Sr  Sr8  1  0.221  0.903  0.697  1.0
  Sr  Sr9  1  0.721  0.097  0.803  1.0
  Sr  Sr10  1  0.157  0.414  0.644  1.0
  Sr  Sr11  1  0.779  0.097  0.303  1.0
  Cr  Cr12  1  0.278  0.307  0.403  1.0
  Cr  Cr13  1  0.722  0.693  0.597  1.0
  Cr  Cr14  1  0.222  0.307  0.903  1.0
  Cr  Cr15  1  0.778  0.693  0.097  1.0
  F  F16  1  0.185  0.453  0.473  1.0
  F  F17  1  0.815  0.547  0.527  1.0
  F  F18  1  0.198  0.081  0.016  1.0
  F  F19  1  0.982  0.255  0.390  1.0
  F  F20  1  0.054  0.854  0.343  1.0
  F  F21  1  0.265  0.528  0.784  1.0
  F  F22  1  0.930  0.356  0.918  1.0
  F  F23  1  0.624  0.825  0.678  1.0
  F  F24  1  0.302  0.081  0.516  1.0
  F  F25  1  0.685  0.547  0.027  1.0
  F  F26  1  0.944  0.816  0.826  1.0
  F  F27  1  0.070  0.644  0.082  1.0
  F  F28  1  0.735  0.472  0.216  1.0
  F  F29  1  0.698  0.919  0.484  1.0
  F  F30  1  0.946  0.146  0.657  1.0
  F  F31  1  0.235  0.528  0.284  1.0
  F  F32  1  0.446  0.854  0.843  1.0
  F  F33  1  0.554  0.146  0.157  1.0
  F  F34  1  0.482  0.745  0.110  1.0
  F  F35  1  0.765  0.472  0.716  1.0
  F  F36  1  0.556  0.816  0.326  1.0
  F  F37  1  0.376  0.175  0.322  1.0
  F  F38  1  0.518  0.255  0.890  1.0
  F  F39  1  0.444  0.184  0.674  1.0
  F  F40  1  0.570  0.356  0.418  1.0
  F  F41  1  0.876  0.825  0.178  1.0
  F  F42  1  0.315  0.453  0.973  1.0
  F  F43  1  0.018  0.745  0.610  1.0
  F  F44  1  0.430  0.644  0.582  1.0
  F  F45  1  0.056  0.184  0.174  1.0
  F  F46  1  0.124  0.175  0.822  1.0
  F  F47  1  0.802  0.919  0.984  1.0
[/CIF]
.