The material described by MgFe6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), two equivalent O(10), two equivalent O(8), and one F(1) atom to form MgO5F octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O3F2 square pyramids, corners with two equivalent Fe(2)O5 square pyramids, edges with two equivalent Mg(1)O5F octahedra, and  a faceface with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 29°. 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 Mg(1)O5F octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 29-50°. 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 FeO5 square pyramids that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 49-62°. 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(4)O3F2 square pyramids, corners with two equivalent Fe(2)O5 square pyramids, 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 square pyramids that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O3F2 square pyramids. The corner-sharing octahedral tilt angles range from 49-56°. 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 a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. In the sixth Fe site, Fe(6) is bonded in a 6-coordinate geometry to one O(11), two equivalent O(10), two equivalent O(9), and one F(1) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), 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 trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a distorted 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 trigonal planar 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 distorted rectangular see-saw-like geometry to two equivalent 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 rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Fe(6) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Fe(6) and two equivalent Fe(4) atoms. F(1) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(6), and two equivalent Fe(4) atoms. is represented by the CIF file [CIF]
data_MgFe6O11F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.922
_cell_length_b   6.815
_cell_length_c   2.928
_cell_angle_alpha   89.991
_cell_angle_beta   89.995
_cell_angle_gamma   70.252
_symmetry_Int_Tables_number   1
_cell_volume   223.905
_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  0.838  0.341  0.012  1.0
  Fe  Fe1  1  0.040  0.001  0.012  1.0
  Fe  Fe2  1  0.045  0.524  0.512  1.0
  Fe  Fe3  1  0.330  0.338  0.012  1.0
  Fe  Fe4  1  0.612  0.127  0.512  1.0
  Fe  Fe5  1  0.332  0.836  0.512  1.0
  Fe  Fe6  1  0.625  0.672  0.012  1.0
  O  O7  1  0.004  0.368  0.012  1.0
  O  O8  1  0.334  0.022  0.012  1.0
  O  O9  1  0.022  0.721  0.012  1.0
  O  O10  1  0.216  0.402  0.512  1.0
  O  O11  1  0.448  0.272  0.512  1.0
  O  O12  1  0.152  0.948  0.512  1.0
  O  O13  1  0.330  0.650  0.012  1.0
  O  O14  1  0.919  0.115  0.512  1.0
  O  O15  1  0.513  0.719  0.512  1.0
  O  O16  1  0.745  0.547  0.512  1.0
  O  O17  1  0.652  0.940  0.012  1.0
  F  F18  1  0.667  0.295  0.012  1.0
[/CIF]
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The material described by MgFe6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), two equivalent O(10), two equivalent O(8), and one F(1) atom to form MgO5F octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O3F2 square pyramids, corners with two equivalent Fe(2)O5 square pyramids, edges with two equivalent Mg(1)O5F octahedra, and  a faceface with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles are 29°. 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 Mg(1)O5F octahedra, corners with two equivalent Fe(5)O6 octahedra, corners with four equivalent Fe(2)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 29-50°. 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 FeO5 square pyramids that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 49-62°. 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(4)O3F2 square pyramids, corners with two equivalent Fe(2)O5 square pyramids, 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 square pyramids that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O3F2 square pyramids. The corner-sharing octahedral tilt angles range from 49-56°. 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 a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. In the sixth Fe site, Fe(6) is bonded in a 6-coordinate geometry to one O(11), two equivalent O(10), two equivalent O(9), and one F(1) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), 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 trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a distorted 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 trigonal planar 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 distorted rectangular see-saw-like geometry to two equivalent 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 rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Fe(6) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Fe(6) and two equivalent Fe(4) atoms. F(1) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(6), and two equivalent Fe(4) atoms. is represented by the CIF file [CIF]
data_MgFe6O11F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.922
_cell_length_b   6.815
_cell_length_c   2.928
_cell_angle_alpha   89.991
_cell_angle_beta   89.995
_cell_angle_gamma   70.252
_symmetry_Int_Tables_number   1
_cell_volume   223.905
_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  0.838  0.341  0.012  1.0
  Fe  Fe1  1  0.040  0.001  0.012  1.0
  Fe  Fe2  1  0.045  0.524  0.512  1.0
  Fe  Fe3  1  0.330  0.338  0.012  1.0
  Fe  Fe4  1  0.612  0.127  0.512  1.0
  Fe  Fe5  1  0.332  0.836  0.512  1.0
  Fe  Fe6  1  0.625  0.672  0.012  1.0
  O  O7  1  0.004  0.368  0.012  1.0
  O  O8  1  0.334  0.022  0.012  1.0
  O  O9  1  0.022  0.721  0.012  1.0
  O  O10  1  0.216  0.402  0.512  1.0
  O  O11  1  0.448  0.272  0.512  1.0
  O  O12  1  0.152  0.948  0.512  1.0
  O  O13  1  0.330  0.650  0.012  1.0
  O  O14  1  0.919  0.115  0.512  1.0
  O  O15  1  0.513  0.719  0.512  1.0
  O  O16  1  0.745  0.547  0.512  1.0
  O  O17  1  0.652  0.940  0.012  1.0
  F  F18  1  0.667  0.295  0.012  1.0
[/CIF]
.