The material described by MgFe6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(10), one O(8), two equivalent O(11), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(4)O3F2 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(6)O5F octahedra, edges with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(4)O3F2 trigonal bipyramid. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(3) atoms to form distorted FeO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 28-60°. In the third Fe site, Fe(3) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Fe(5)O6 octahedra, corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(4)O3F2 trigonal bipyramids, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the fourth Fe site, Fe(4) is bonded to one O(5), two equivalent O(11), and two equivalent F(1) atoms to form distorted FeO3F2 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(6)O5F octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(4)O3F2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 29-63°. In the fifth Fe site, Fe(5) is bonded to one O(6), one O(9), two equivalent O(2), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(6)O5F octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-51°. In the sixth Fe site, Fe(6) is bonded to one O(11), two equivalent O(10), two equivalent O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(4)O3F2 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(6)O5F octahedra. The corner-sharing octahedral tilt angles are 50°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(5) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(1), and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(3) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Fe(4) and two equivalent Fe(3) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(1) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(5) atoms. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Fe(1) atoms. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(6) atoms. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Fe(6) atoms. In the eleventh O site, O(11) is bonded to two equivalent Mg(1), one Fe(6), and two equivalent Fe(4) atoms to form distorted edge-sharing OMg2Fe3 trigonal bipyramids. F(1) is bonded in a distorted T-shaped geometry to one Fe(6) and two equivalent Fe(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe6O11F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.444
_cell_length_b   6.838
_cell_length_c   2.933
_cell_angle_alpha   90.002
_cell_angle_beta   90.002
_cell_angle_gamma   71.437
_symmetry_Int_Tables_number   1
_cell_volume   217.598
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.842  0.819  0.488  1.0
  Fe  Fe1  1  0.025  0.002  0.989  1.0
  Fe  Fe2  1  0.042  0.459  0.489  1.0
  Fe  Fe3  1  0.333  0.338  0.989  1.0
  Fe  Fe4  1  0.627  0.178  0.489  1.0
  Fe  Fe5  1  0.330  0.840  0.489  1.0
  Fe  Fe6  1  0.637  0.691  0.989  1.0
  O  O7  1  0.027  0.287  0.989  1.0
  O  O8  1  0.325  0.028  0.989  1.0
  O  O9  1  0.971  0.682  0.988  1.0
  O  O10  1  0.216  0.413  0.489  1.0
  O  O11  1  0.458  0.261  0.489  1.0
  O  O12  1  0.140  0.911  0.489  1.0
  O  O13  1  0.339  0.649  0.989  1.0
  O  O14  1  0.909  0.054  0.489  1.0
  O  O15  1  0.523  0.759  0.489  1.0
  O  O16  1  0.751  0.615  0.489  1.0
  O  O17  1  0.695  0.974  0.989  1.0
  F  F18  1  0.648  0.369  0.989  1.0
[/CIF]
.
The material described by MgFe6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(10), one O(8), two equivalent O(11), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(4)O3F2 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(6)O5F octahedra, edges with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(4)O3F2 trigonal bipyramid. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(3) atoms to form distorted FeO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 28-60°. In the third Fe site, Fe(3) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Fe(5)O6 octahedra, corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(4)O3F2 trigonal bipyramids, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the fourth Fe site, Fe(4) is bonded to one O(5), two equivalent O(11), and two equivalent F(1) atoms to form distorted FeO3F2 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(6)O5F octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(4)O3F2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 29-63°. In the fifth Fe site, Fe(5) is bonded to one O(6), one O(9), two equivalent O(2), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(6)O5F octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-51°. In the sixth Fe site, Fe(6) is bonded to one O(11), two equivalent O(10), two equivalent O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(4)O3F2 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(6)O5F octahedra. The corner-sharing octahedral tilt angles are 50°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(5) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(1), and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(3) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Fe(4) and two equivalent Fe(3) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(1) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(5) atoms. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Fe(1) atoms. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(6) atoms. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one Mg(1) and two equivalent Fe(6) atoms. In the eleventh O site, O(11) is bonded to two equivalent Mg(1), one Fe(6), and two equivalent Fe(4) atoms to form distorted edge-sharing OMg2Fe3 trigonal bipyramids. F(1) is bonded in a distorted T-shaped geometry to one Fe(6) and two equivalent Fe(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe6O11F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.444
_cell_length_b   6.838
_cell_length_c   2.933
_cell_angle_alpha   90.002
_cell_angle_beta   90.002
_cell_angle_gamma   71.437
_symmetry_Int_Tables_number   1
_cell_volume   217.598
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.842  0.819  0.488  1.0
  Fe  Fe1  1  0.025  0.002  0.989  1.0
  Fe  Fe2  1  0.042  0.459  0.489  1.0
  Fe  Fe3  1  0.333  0.338  0.989  1.0
  Fe  Fe4  1  0.627  0.178  0.489  1.0
  Fe  Fe5  1  0.330  0.840  0.489  1.0
  Fe  Fe6  1  0.637  0.691  0.989  1.0
  O  O7  1  0.027  0.287  0.989  1.0
  O  O8  1  0.325  0.028  0.989  1.0
  O  O9  1  0.971  0.682  0.988  1.0
  O  O10  1  0.216  0.413  0.489  1.0
  O  O11  1  0.458  0.261  0.489  1.0
  O  O12  1  0.140  0.911  0.489  1.0
  O  O13  1  0.339  0.649  0.989  1.0
  O  O14  1  0.909  0.054  0.489  1.0
  O  O15  1  0.523  0.759  0.489  1.0
  O  O16  1  0.751  0.615  0.489  1.0
  O  O17  1  0.695  0.974  0.989  1.0
  F  F18  1  0.648  0.369  0.989  1.0
[/CIF]
.