The crystal structure described by BaMgSnF7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 12-coordinate geometry to one F(1), one F(2), two equivalent F(3), two equivalent F(4), two equivalent F(5), two equivalent F(6), and two equivalent F(7) atoms. Mg(1) is bonded to one F(1), one F(2), one F(3), one F(5), one F(6), and one F(7) atom to form MgF6 octahedra that share corners with three equivalent Sn(1)F6 octahedra and  an edgeedge with one Sn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 55-61°. Sn(1) is bonded to one F(1), one F(2), one F(3), one F(4), one F(5), and one F(6) atom to form SnF6 octahedra that share corners with three equivalent Mg(1)F6 octahedra and  an edgeedge with one Mg(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 55-61°. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one Sn(1) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one Sn(1) atom. In the third F site, F(3) is bonded in a distorted water-like geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to two equivalent Ba(1) and one Sn(1) atom. In the fifth F site, F(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the sixth F site, F(6) is bonded in a distorted water-like geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Mg(1) atom. is represented by the CIF file [CIF]
data_BaMgSnF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.370
_cell_length_b   5.802
_cell_length_c   9.968
_cell_angle_alpha   87.337
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.100
_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
  Ba  Ba0  1  0.326  0.729  0.495  1.0
  Ba  Ba1  1  0.826  0.271  0.005  1.0
  Ba  Ba2  1  0.674  0.271  0.505  1.0
  Ba  Ba3  1  0.174  0.729  0.995  1.0
  Mg  Mg4  1  0.389  0.306  0.807  1.0
  Mg  Mg5  1  0.889  0.694  0.693  1.0
  Mg  Mg6  1  0.111  0.306  0.307  1.0
  Mg  Mg7  1  0.611  0.694  0.193  1.0
  Sn  Sn8  1  0.600  0.802  0.817  1.0
  Sn  Sn9  1  0.400  0.198  0.183  1.0
  Sn  Sn10  1  0.900  0.802  0.317  1.0
  Sn  Sn11  1  0.100  0.198  0.683  1.0
  F  F12  1  0.451  0.856  0.125  1.0
  F  F13  1  0.073  0.616  0.383  1.0
  F  F14  1  0.722  0.515  0.754  1.0
  F  F15  1  0.278  0.485  0.246  1.0
  F  F16  1  0.460  0.095  0.379  1.0
  F  F17  1  0.799  0.758  0.511  1.0
  F  F18  1  0.785  0.972  0.755  1.0
  F  F19  1  0.960  0.905  0.121  1.0
  F  F20  1  0.427  0.616  0.883  1.0
  F  F21  1  0.222  0.485  0.746  1.0
  F  F22  1  0.049  0.856  0.625  1.0
  F  F23  1  0.549  0.144  0.875  1.0
  F  F24  1  0.285  0.028  0.745  1.0
  F  F25  1  0.964  0.593  0.865  1.0
  F  F26  1  0.540  0.905  0.621  1.0
  F  F27  1  0.040  0.095  0.879  1.0
  F  F28  1  0.215  0.028  0.245  1.0
  F  F29  1  0.951  0.144  0.375  1.0
  F  F30  1  0.464  0.407  0.635  1.0
  F  F31  1  0.927  0.384  0.617  1.0
  F  F32  1  0.036  0.407  0.135  1.0
  F  F33  1  0.715  0.972  0.255  1.0
  F  F34  1  0.536  0.593  0.365  1.0
  F  F35  1  0.299  0.242  0.989  1.0
  F  F36  1  0.201  0.242  0.489  1.0
  F  F37  1  0.701  0.758  0.011  1.0
  F  F38  1  0.573  0.384  0.117  1.0
  F  F39  1  0.778  0.515  0.254  1.0
[/CIF]
.
The crystal structure described by BaMgSnF7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 12-coordinate geometry to one F(1), one F(2), two equivalent F(3), two equivalent F(4), two equivalent F(5), two equivalent F(6), and two equivalent F(7) atoms. Mg(1) is bonded to one F(1), one F(2), one F(3), one F(5), one F(6), and one F(7) atom to form MgF6 octahedra that share corners with three equivalent Sn(1)F6 octahedra and  an edgeedge with one Sn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 55-61°. Sn(1) is bonded to one F(1), one F(2), one F(3), one F(4), one F(5), and one F(6) atom to form SnF6 octahedra that share corners with three equivalent Mg(1)F6 octahedra and  an edgeedge with one Mg(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 55-61°. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one Sn(1) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one Sn(1) atom. In the third F site, F(3) is bonded in a distorted water-like geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to two equivalent Ba(1) and one Sn(1) atom. In the fifth F site, F(5) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the sixth F site, F(6) is bonded in a distorted water-like geometry to two equivalent Ba(1), one Mg(1), and one Sn(1) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Mg(1) atom. is represented by the CIF file [CIF]
data_BaMgSnF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.370
_cell_length_b   5.802
_cell_length_c   9.968
_cell_angle_alpha   87.337
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.100
_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
  Ba  Ba0  1  0.326  0.729  0.495  1.0
  Ba  Ba1  1  0.826  0.271  0.005  1.0
  Ba  Ba2  1  0.674  0.271  0.505  1.0
  Ba  Ba3  1  0.174  0.729  0.995  1.0
  Mg  Mg4  1  0.389  0.306  0.807  1.0
  Mg  Mg5  1  0.889  0.694  0.693  1.0
  Mg  Mg6  1  0.111  0.306  0.307  1.0
  Mg  Mg7  1  0.611  0.694  0.193  1.0
  Sn  Sn8  1  0.600  0.802  0.817  1.0
  Sn  Sn9  1  0.400  0.198  0.183  1.0
  Sn  Sn10  1  0.900  0.802  0.317  1.0
  Sn  Sn11  1  0.100  0.198  0.683  1.0
  F  F12  1  0.451  0.856  0.125  1.0
  F  F13  1  0.073  0.616  0.383  1.0
  F  F14  1  0.722  0.515  0.754  1.0
  F  F15  1  0.278  0.485  0.246  1.0
  F  F16  1  0.460  0.095  0.379  1.0
  F  F17  1  0.799  0.758  0.511  1.0
  F  F18  1  0.785  0.972  0.755  1.0
  F  F19  1  0.960  0.905  0.121  1.0
  F  F20  1  0.427  0.616  0.883  1.0
  F  F21  1  0.222  0.485  0.746  1.0
  F  F22  1  0.049  0.856  0.625  1.0
  F  F23  1  0.549  0.144  0.875  1.0
  F  F24  1  0.285  0.028  0.745  1.0
  F  F25  1  0.964  0.593  0.865  1.0
  F  F26  1  0.540  0.905  0.621  1.0
  F  F27  1  0.040  0.095  0.879  1.0
  F  F28  1  0.215  0.028  0.245  1.0
  F  F29  1  0.951  0.144  0.375  1.0
  F  F30  1  0.464  0.407  0.635  1.0
  F  F31  1  0.927  0.384  0.617  1.0
  F  F32  1  0.036  0.407  0.135  1.0
  F  F33  1  0.715  0.972  0.255  1.0
  F  F34  1  0.536  0.593  0.365  1.0
  F  F35  1  0.299  0.242  0.989  1.0
  F  F36  1  0.201  0.242  0.489  1.0
  F  F37  1  0.701  0.758  0.011  1.0
  F  F38  1  0.573  0.384  0.117  1.0
  F  F39  1  0.778  0.515  0.254  1.0
[/CIF]
.