The crystal structure described by MgMn2(FeO2)4 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the third Fe site, Fe(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Fe(2), one Fe(3), and one Fe(4) atom to form OMnFe3 trigonal pyramids that share corners with three equivalent O(2)MgMnFe3 square pyramids, corners with three equivalent O(3)MgMnFe3 trigonal bipyramids, corners with three equivalent O(1)MnFe3 trigonal pyramids,  an edgeedge with one O(2)MgMnFe3 square pyramid, and  an edgeedge with one O(3)MgMnFe3 trigonal bipyramid. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Fe(1), one Fe(3), and one Fe(4) atom to form OMgMnFe3 square pyramids that share corners with four equivalent O(2)MgMnFe3 square pyramids,  a cornercorner with one O(3)MgMnFe3 trigonal bipyramid, corners with three equivalent O(1)MnFe3 trigonal pyramids, edges with three equivalent O(3)MgMnFe3 trigonal bipyramids, and  an edgeedge with one O(1)MnFe3 trigonal pyramid. In the third O site, O(3) is bonded to one Mg(1), one Mn(1), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OMgMnFe3 trigonal bipyramids that share  a cornercorner with one O(2)MgMnFe3 square pyramid, corners with four equivalent O(3)MgMnFe3 trigonal bipyramids, corners with three equivalent O(1)MnFe3 trigonal pyramids, edges with three equivalent O(2)MgMnFe3 square pyramids, and  an edgeedge with one O(1)MnFe3 trigonal pyramid. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Mg(1), two equivalent Mn(1), one Fe(1), one Fe(2), and one Fe(4) atom. is represented by the CIF file [CIF]
data_MgMn2(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.551
_cell_length_b   6.103
_cell_length_c   6.843
_cell_angle_alpha   55.323
_cell_angle_beta   53.359
_cell_angle_gamma   57.371
_symmetry_Int_Tables_number   1
_cell_volume   172.091
_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  0.000  1.000  1.000  1.0
  Mn  Mn1  1  0.153  0.208  0.114  1.0
  Mn  Mn2  1  0.847  0.792  0.886  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.500  0.500  0.000  1.0
  Fe  Fe5  1  0.000  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.000  0.500  1.0
  O  O7  1  0.727  0.753  0.702  1.0
  O  O8  1  0.225  0.286  0.721  1.0
  O  O9  1  0.235  0.767  0.210  1.0
  O  O10  1  0.743  0.305  0.196  1.0
  O  O11  1  0.765  0.233  0.790  1.0
  O  O12  1  0.257  0.695  0.804  1.0
  O  O13  1  0.273  0.247  0.298  1.0
  O  O14  1  0.775  0.714  0.279  1.0
[/CIF]
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The crystal structure described by MgMn2(FeO2)4 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. Mn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the third Fe site, Fe(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(4)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Fe(2), one Fe(3), and one Fe(4) atom to form OMnFe3 trigonal pyramids that share corners with three equivalent O(2)MgMnFe3 square pyramids, corners with three equivalent O(3)MgMnFe3 trigonal bipyramids, corners with three equivalent O(1)MnFe3 trigonal pyramids,  an edgeedge with one O(2)MgMnFe3 square pyramid, and  an edgeedge with one O(3)MgMnFe3 trigonal bipyramid. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Fe(1), one Fe(3), and one Fe(4) atom to form OMgMnFe3 square pyramids that share corners with four equivalent O(2)MgMnFe3 square pyramids,  a cornercorner with one O(3)MgMnFe3 trigonal bipyramid, corners with three equivalent O(1)MnFe3 trigonal pyramids, edges with three equivalent O(3)MgMnFe3 trigonal bipyramids, and  an edgeedge with one O(1)MnFe3 trigonal pyramid. In the third O site, O(3) is bonded to one Mg(1), one Mn(1), one Fe(1), one Fe(2), and one Fe(3) atom to form distorted OMgMnFe3 trigonal bipyramids that share  a cornercorner with one O(2)MgMnFe3 square pyramid, corners with four equivalent O(3)MgMnFe3 trigonal bipyramids, corners with three equivalent O(1)MnFe3 trigonal pyramids, edges with three equivalent O(2)MgMnFe3 square pyramids, and  an edgeedge with one O(1)MnFe3 trigonal pyramid. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Mg(1), two equivalent Mn(1), one Fe(1), one Fe(2), and one Fe(4) atom. is represented by the CIF file [CIF]
data_MgMn2(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.551
_cell_length_b   6.103
_cell_length_c   6.843
_cell_angle_alpha   55.323
_cell_angle_beta   53.359
_cell_angle_gamma   57.371
_symmetry_Int_Tables_number   1
_cell_volume   172.091
_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  0.000  1.000  1.000  1.0
  Mn  Mn1  1  0.153  0.208  0.114  1.0
  Mn  Mn2  1  0.847  0.792  0.886  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.500  0.500  0.000  1.0
  Fe  Fe5  1  0.000  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.000  0.500  1.0
  O  O7  1  0.727  0.753  0.702  1.0
  O  O8  1  0.225  0.286  0.721  1.0
  O  O9  1  0.235  0.767  0.210  1.0
  O  O10  1  0.743  0.305  0.196  1.0
  O  O11  1  0.765  0.233  0.790  1.0
  O  O12  1  0.257  0.695  0.804  1.0
  O  O13  1  0.273  0.247  0.298  1.0
  O  O14  1  0.775  0.714  0.279  1.0
[/CIF]
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