The structure described by BaMgBiF7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one F(2), one F(5), one F(6), two equivalent F(3), two equivalent F(4), 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 Bi(1)F6 octahedra and  an edgeedge with one Bi(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 54-71°. Bi(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 distorted BiF6 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 54-71°. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one Bi(1) atom. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Mg(1), and one Bi(1) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to two equivalent Ba(1) and one Bi(1) atom. In the fifth F site, F(5) is bonded in a 3-coordinate geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the sixth F site, F(6) is bonded in a 1-coordinate geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the seventh F site, F(7) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Mg(1) atom. is represented by the CIF file [CIF]
data_BaMgBiF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.787
_cell_length_b   5.713
_cell_length_c   9.921
_cell_angle_alpha   88.571
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   611.205
_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  0.332  0.744  0.491  1.0
  Ba  Ba1  1  0.832  0.256  0.009  1.0
  Ba  Ba2  1  0.668  0.256  0.509  1.0
  Ba  Ba3  1  0.168  0.744  0.991  1.0
  Mg  Mg4  1  0.374  0.304  0.801  1.0
  Mg  Mg5  1  0.874  0.696  0.699  1.0
  Mg  Mg6  1  0.126  0.304  0.301  1.0
  Mg  Mg7  1  0.626  0.696  0.199  1.0
  Bi  Bi8  1  0.585  0.777  0.833  1.0
  Bi  Bi9  1  0.415  0.223  0.167  1.0
  Bi  Bi10  1  0.915  0.777  0.333  1.0
  Bi  Bi11  1  0.085  0.223  0.667  1.0
  F  F12  1  0.475  0.855  0.124  1.0
  F  F13  1  0.099  0.599  0.407  1.0
  F  F14  1  0.727  0.498  0.766  1.0
  F  F15  1  0.273  0.502  0.234  1.0
  F  F16  1  0.465  0.083  0.372  1.0
  F  F17  1  0.789  0.799  0.524  1.0
  F  F18  1  0.774  0.965  0.775  1.0
  F  F19  1  0.965  0.917  0.128  1.0
  F  F20  1  0.402  0.599  0.907  1.0
  F  F21  1  0.227  0.502  0.734  1.0
  F  F22  1  0.025  0.855  0.624  1.0
  F  F23  1  0.525  0.145  0.876  1.0
  F  F24  1  0.274  0.035  0.725  1.0
  F  F25  1  0.972  0.557  0.848  1.0
  F  F26  1  0.535  0.917  0.628  1.0
  F  F27  1  0.035  0.083  0.872  1.0
  F  F28  1  0.226  0.035  0.225  1.0
  F  F29  1  0.975  0.145  0.376  1.0
  F  F30  1  0.472  0.443  0.652  1.0
  F  F31  1  0.901  0.401  0.593  1.0
  F  F32  1  0.028  0.443  0.152  1.0
  F  F33  1  0.726  0.965  0.275  1.0
  F  F34  1  0.528  0.557  0.348  1.0
  F  F35  1  0.289  0.201  0.976  1.0
  F  F36  1  0.211  0.201  0.476  1.0
  F  F37  1  0.711  0.799  0.024  1.0
  F  F38  1  0.599  0.401  0.093  1.0
  F  F39  1  0.773  0.498  0.266  1.0
[/CIF]
.
The structure described by BaMgBiF7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 9-coordinate geometry to one F(2), one F(5), one F(6), two equivalent F(3), two equivalent F(4), 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 Bi(1)F6 octahedra and  an edgeedge with one Bi(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 54-71°. Bi(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 distorted BiF6 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 54-71°. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one Bi(1) atom. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Mg(1), and one Bi(1) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to two equivalent Ba(1) and one Bi(1) atom. In the fifth F site, F(5) is bonded in a 3-coordinate geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the sixth F site, F(6) is bonded in a 1-coordinate geometry to one Ba(1), one Mg(1), and one Bi(1) atom. In the seventh F site, F(7) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Mg(1) atom. is represented by the CIF file [CIF]
data_BaMgBiF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.787
_cell_length_b   5.713
_cell_length_c   9.921
_cell_angle_alpha   88.571
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   611.205
_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  0.332  0.744  0.491  1.0
  Ba  Ba1  1  0.832  0.256  0.009  1.0
  Ba  Ba2  1  0.668  0.256  0.509  1.0
  Ba  Ba3  1  0.168  0.744  0.991  1.0
  Mg  Mg4  1  0.374  0.304  0.801  1.0
  Mg  Mg5  1  0.874  0.696  0.699  1.0
  Mg  Mg6  1  0.126  0.304  0.301  1.0
  Mg  Mg7  1  0.626  0.696  0.199  1.0
  Bi  Bi8  1  0.585  0.777  0.833  1.0
  Bi  Bi9  1  0.415  0.223  0.167  1.0
  Bi  Bi10  1  0.915  0.777  0.333  1.0
  Bi  Bi11  1  0.085  0.223  0.667  1.0
  F  F12  1  0.475  0.855  0.124  1.0
  F  F13  1  0.099  0.599  0.407  1.0
  F  F14  1  0.727  0.498  0.766  1.0
  F  F15  1  0.273  0.502  0.234  1.0
  F  F16  1  0.465  0.083  0.372  1.0
  F  F17  1  0.789  0.799  0.524  1.0
  F  F18  1  0.774  0.965  0.775  1.0
  F  F19  1  0.965  0.917  0.128  1.0
  F  F20  1  0.402  0.599  0.907  1.0
  F  F21  1  0.227  0.502  0.734  1.0
  F  F22  1  0.025  0.855  0.624  1.0
  F  F23  1  0.525  0.145  0.876  1.0
  F  F24  1  0.274  0.035  0.725  1.0
  F  F25  1  0.972  0.557  0.848  1.0
  F  F26  1  0.535  0.917  0.628  1.0
  F  F27  1  0.035  0.083  0.872  1.0
  F  F28  1  0.226  0.035  0.225  1.0
  F  F29  1  0.975  0.145  0.376  1.0
  F  F30  1  0.472  0.443  0.652  1.0
  F  F31  1  0.901  0.401  0.593  1.0
  F  F32  1  0.028  0.443  0.152  1.0
  F  F33  1  0.726  0.965  0.275  1.0
  F  F34  1  0.528  0.557  0.348  1.0
  F  F35  1  0.289  0.201  0.976  1.0
  F  F36  1  0.211  0.201  0.476  1.0
  F  F37  1  0.711  0.799  0.024  1.0
  F  F38  1  0.599  0.401  0.093  1.0
  F  F39  1  0.773  0.498  0.266  1.0
[/CIF]
.