The compound described by MgMn2(FeO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form distorted MgO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, corners with two equivalent Fe(2)O4 tetrahedra, and  an edgeedge with one Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-68°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Fe(2)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Fe(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form FeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-66°. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-64°. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the fourth Fe site, Fe(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Fe(2), one Fe(3), and one Fe(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Fe(2), and one Fe(4) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(2), one Fe(2), one Fe(3), and one Fe(4) atom. In the fifth O site, O(5) is bonded to one Mn(2), one Fe(1), one Fe(3), and one Fe(4) atom to form OMnFe3 tetrahedra that share  a cornercorner with one O(6)MnFe3 tetrahedra, corners with two equivalent O(7)MgMn2Fe tetrahedra, corners with two equivalent O(8)MgMn2Fe tetrahedra, and  an edgeedge with one O(6)MnFe3 tetrahedra. In the sixth O site, O(6) is bonded to one Mn(1), one Fe(1), one Fe(3), and one Fe(4) atom to form OMnFe3 tetrahedra that share  a cornercorner with one O(5)MnFe3 tetrahedra, corners with two equivalent O(7)MgMn2Fe tetrahedra, corners with two equivalent O(8)MgMn2Fe tetrahedra, and  an edgeedge with one O(5)MnFe3 tetrahedra. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Fe(1) atom to form distorted OMgMn2Fe tetrahedra that share corners with two equivalent O(5)MnFe3 tetrahedra, corners with two equivalent O(6)MnFe3 tetrahedra, and edges with two equivalent O(8)MgMn2Fe tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Fe(1) atom to form distorted OMgMn2Fe tetrahedra that share corners with two equivalent O(5)MnFe3 tetrahedra, corners with two equivalent O(6)MnFe3 tetrahedra, and edges with two equivalent O(7)MgMn2Fe tetrahedra. is represented by the CIF file [CIF]
data_MgMn2(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.501
_cell_length_b   6.472
_cell_length_c   5.936
_cell_angle_alpha   63.979
_cell_angle_beta   63.395
_cell_angle_gamma   55.659
_symmetry_Int_Tables_number   1
_cell_volume   178.442
_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  0.790  0.768  0.211  1.0
  Mn  Mn1  1  0.110  0.626  0.634  1.0
  Mn  Mn2  1  0.619  0.104  0.640  1.0
  Fe  Fe3  1  0.043  0.045  0.952  1.0
  Fe  Fe4  1  0.237  0.240  0.267  1.0
  Fe  Fe5  1  0.558  0.577  0.152  1.0
  Fe  Fe6  1  0.575  0.575  0.687  1.0
  O  O7  1  0.354  0.366  0.407  1.0
  O  O8  1  0.417  0.862  0.364  1.0
  O  O9  1  0.348  0.372  0.892  1.0
  O  O10  1  0.862  0.402  0.379  1.0
  O  O11  1  0.408  0.867  0.859  1.0
  O  O12  1  0.853  0.408  0.872  1.0
  O  O13  1  0.921  0.899  0.331  1.0
  O  O14  1  0.915  0.900  0.841  1.0
[/CIF]
.
The compound described by MgMn2(FeO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form distorted MgO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, corners with two equivalent Fe(2)O4 tetrahedra, and  an edgeedge with one Fe(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-68°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Fe(2)O4 tetrahedra, and edges with two equivalent Mn(2)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted MnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Fe(2)O4 tetrahedra, and edges with two equivalent Mn(1)O6 octahedra. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form FeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-66°. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-64°. In the third Fe site, Fe(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the fourth Fe site, Fe(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Fe(2), one Fe(3), and one Fe(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Fe(2), and one Fe(4) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(2), one Fe(2), one Fe(3), and one Fe(4) atom. In the fifth O site, O(5) is bonded to one Mn(2), one Fe(1), one Fe(3), and one Fe(4) atom to form OMnFe3 tetrahedra that share  a cornercorner with one O(6)MnFe3 tetrahedra, corners with two equivalent O(7)MgMn2Fe tetrahedra, corners with two equivalent O(8)MgMn2Fe tetrahedra, and  an edgeedge with one O(6)MnFe3 tetrahedra. In the sixth O site, O(6) is bonded to one Mn(1), one Fe(1), one Fe(3), and one Fe(4) atom to form OMnFe3 tetrahedra that share  a cornercorner with one O(5)MnFe3 tetrahedra, corners with two equivalent O(7)MgMn2Fe tetrahedra, corners with two equivalent O(8)MgMn2Fe tetrahedra, and  an edgeedge with one O(5)MnFe3 tetrahedra. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Fe(1) atom to form distorted OMgMn2Fe tetrahedra that share corners with two equivalent O(5)MnFe3 tetrahedra, corners with two equivalent O(6)MnFe3 tetrahedra, and edges with two equivalent O(8)MgMn2Fe tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Fe(1) atom to form distorted OMgMn2Fe tetrahedra that share corners with two equivalent O(5)MnFe3 tetrahedra, corners with two equivalent O(6)MnFe3 tetrahedra, and edges with two equivalent O(7)MgMn2Fe tetrahedra. is represented by the CIF file [CIF]
data_MgMn2(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.501
_cell_length_b   6.472
_cell_length_c   5.936
_cell_angle_alpha   63.979
_cell_angle_beta   63.395
_cell_angle_gamma   55.659
_symmetry_Int_Tables_number   1
_cell_volume   178.442
_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  0.790  0.768  0.211  1.0
  Mn  Mn1  1  0.110  0.626  0.634  1.0
  Mn  Mn2  1  0.619  0.104  0.640  1.0
  Fe  Fe3  1  0.043  0.045  0.952  1.0
  Fe  Fe4  1  0.237  0.240  0.267  1.0
  Fe  Fe5  1  0.558  0.577  0.152  1.0
  Fe  Fe6  1  0.575  0.575  0.687  1.0
  O  O7  1  0.354  0.366  0.407  1.0
  O  O8  1  0.417  0.862  0.364  1.0
  O  O9  1  0.348  0.372  0.892  1.0
  O  O10  1  0.862  0.402  0.379  1.0
  O  O11  1  0.408  0.867  0.859  1.0
  O  O12  1  0.853  0.408  0.872  1.0
  O  O13  1  0.921  0.899  0.331  1.0
  O  O14  1  0.915  0.900  0.841  1.0
[/CIF]
.