The material described by MgFe6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), one O(7), one F(1), and one F(2) atom to form MgO4F2 octahedra that share  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  a cornercorner with one Fe(3)O5 square pyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  an edgeedge with one Fe(3)O5 square pyramid,  an edgeedge with one Fe(1)O5 trigonal bipyramid,  a faceface with one Fe(4)O5F octahedra, and  a faceface with one Fe(5)O4F2 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 44-49°. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(4)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 41-75°. In the second Fe site, Fe(2) is bonded to one O(10), one O(4), one O(5), one O(8), and one O(9) atom to form distorted FeO5 square pyramids that share corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  an edgeedge with one Fe(3)O5 square pyramid, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 43-52°. In the third Fe site, Fe(3) is bonded to one O(1), one O(4), one O(6), one O(7), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Fe(6)O5F octahedra, corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(5)O4F2 pentagonal pyramids,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-77°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(10), one O(2), one O(5), one O(7), and one F(2) atom to form distorted FeO5F octahedra that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(3)O5 square pyramids, corners with three equivalent Fe(1)O5 trigonal bipyramids,  an edgeedge with one Fe(6)O5F octahedra,  an edgeedge with one Fe(5)O4F2 pentagonal pyramid, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 45°. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(3), one O(6), one O(8), one F(1), and one F(2) atom to form distorted FeO4F2 pentagonal pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Fe(2)O5 square pyramid, corners with three equivalent Fe(3)O5 square pyramids,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  an edgeedge with one Fe(4)O5F octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 51°. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(2), one O(3), one O(4), one O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Mg(1)O4F2 octahedra,  a cornercorner with one Fe(3)O5 square pyramid, corners with three equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(1)O5 trigonal bipyramids,  an edgeedge with one Fe(4)O5F octahedra, and  an edgeedge with one Fe(5)O4F2 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 44-49°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Fe(3), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), one Fe(4), and one Fe(6) atom. In the third O site, O(3) is bonded in a water-like geometry to one Fe(5) and one Fe(6) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(6) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Fe(1), one Fe(3), and one Fe(5) atom to form a mixture of corner and edge-sharing OMgFe3 trigonal pyramids. In the seventh O site, O(7) is bonded to one Mg(1), one Fe(1), one Fe(3), and one Fe(4) atom to form a mixture of distorted corner and edge-sharing OMgFe3 tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(5), and one Fe(6) atom. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe6(O5F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.129
_cell_length_b   7.655
_cell_length_c   5.706
_cell_angle_alpha   98.640
_cell_angle_beta   97.449
_cell_angle_gamma   84.639
_symmetry_Int_Tables_number   1
_cell_volume   218.981
_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  0.036  0.491  0.004  1.0
  Fe  Fe1  1  0.550  0.699  0.115  1.0
  Fe  Fe2  1  0.434  0.978  0.535  1.0
  Fe  Fe3  1  0.549  0.339  0.801  1.0
  Fe  Fe4  1  0.982  0.683  0.637  1.0
  Fe  Fe5  1  0.963  0.302  0.377  1.0
  Fe  Fe6  1  0.994  0.990  0.998  1.0
  O  O7  1  0.835  0.434  0.658  1.0
  O  O8  1  0.847  0.747  0.957  1.0
  O  O9  1  0.839  0.081  0.273  1.0
  O  O10  1  0.690  0.095  0.796  1.0
  O  O11  1  0.666  0.766  0.455  1.0
  O  O12  1  0.704  0.434  0.121  1.0
  O  O13  1  0.325  0.561  0.851  1.0
  O  O14  1  0.311  0.229  0.549  1.0
  O  O15  1  0.304  0.902  0.195  1.0
  O  O16  1  0.168  0.899  0.712  1.0
  F  F17  1  0.166  0.245  0.052  1.0
  F  F18  1  0.150  0.550  0.354  1.0
[/CIF]
.
The material described by MgFe6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), one O(7), one F(1), and one F(2) atom to form MgO4F2 octahedra that share  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  a cornercorner with one Fe(3)O5 square pyramid,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  an edgeedge with one Fe(3)O5 square pyramid,  an edgeedge with one Fe(1)O5 trigonal bipyramid,  a faceface with one Fe(4)O5F octahedra, and  a faceface with one Fe(5)O4F2 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 44-49°. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(4)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 41-75°. In the second Fe site, Fe(2) is bonded to one O(10), one O(4), one O(5), one O(8), and one O(9) atom to form distorted FeO5 square pyramids that share corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(5)O4F2 pentagonal pyramid,  an edgeedge with one Fe(3)O5 square pyramid, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 43-52°. In the third Fe site, Fe(3) is bonded to one O(1), one O(4), one O(6), one O(7), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Fe(6)O5F octahedra, corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(5)O4F2 pentagonal pyramids,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Fe(2)O5 square pyramid, and  an edgeedge with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-77°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(10), one O(2), one O(5), one O(7), and one F(2) atom to form distorted FeO5F octahedra that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(3)O5 square pyramids, corners with three equivalent Fe(1)O5 trigonal bipyramids,  an edgeedge with one Fe(6)O5F octahedra,  an edgeedge with one Fe(5)O4F2 pentagonal pyramid, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 45°. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(3), one O(6), one O(8), one F(1), and one F(2) atom to form distorted FeO4F2 pentagonal pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Fe(2)O5 square pyramid, corners with three equivalent Fe(3)O5 square pyramids,  a cornercorner with one Fe(1)O5 trigonal bipyramid,  an edgeedge with one Fe(4)O5F octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 51°. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(2), one O(3), one O(4), one O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Mg(1)O4F2 octahedra,  a cornercorner with one Fe(3)O5 square pyramid, corners with three equivalent Fe(2)O5 square pyramids, corners with two equivalent Fe(1)O5 trigonal bipyramids,  an edgeedge with one Fe(4)O5F octahedra, and  an edgeedge with one Fe(5)O4F2 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 44-49°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Fe(3), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), one Fe(4), and one Fe(6) atom. In the third O site, O(3) is bonded in a water-like geometry to one Fe(5) and one Fe(6) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(6) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Fe(1), one Fe(3), and one Fe(5) atom to form a mixture of corner and edge-sharing OMgFe3 trigonal pyramids. In the seventh O site, O(7) is bonded to one Mg(1), one Fe(1), one Fe(3), and one Fe(4) atom to form a mixture of distorted corner and edge-sharing OMgFe3 tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(5), and one Fe(6) atom. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgFe6(O5F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.129
_cell_length_b   7.655
_cell_length_c   5.706
_cell_angle_alpha   98.640
_cell_angle_beta   97.449
_cell_angle_gamma   84.639
_symmetry_Int_Tables_number   1
_cell_volume   218.981
_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  0.036  0.491  0.004  1.0
  Fe  Fe1  1  0.550  0.699  0.115  1.0
  Fe  Fe2  1  0.434  0.978  0.535  1.0
  Fe  Fe3  1  0.549  0.339  0.801  1.0
  Fe  Fe4  1  0.982  0.683  0.637  1.0
  Fe  Fe5  1  0.963  0.302  0.377  1.0
  Fe  Fe6  1  0.994  0.990  0.998  1.0
  O  O7  1  0.835  0.434  0.658  1.0
  O  O8  1  0.847  0.747  0.957  1.0
  O  O9  1  0.839  0.081  0.273  1.0
  O  O10  1  0.690  0.095  0.796  1.0
  O  O11  1  0.666  0.766  0.455  1.0
  O  O12  1  0.704  0.434  0.121  1.0
  O  O13  1  0.325  0.561  0.851  1.0
  O  O14  1  0.311  0.229  0.549  1.0
  O  O15  1  0.304  0.902  0.195  1.0
  O  O16  1  0.168  0.899  0.712  1.0
  F  F17  1  0.166  0.245  0.052  1.0
  F  F18  1  0.150  0.550  0.354  1.0
[/CIF]
.