The material structure described by MgFe2O4 is Spinel-like structured and crystallizes in the tetragonal P4_122 space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Fe(2)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra and corners with six equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-61°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(2), and two equivalent Fe(1) atoms. is represented by the CIF file [CIF]
data_Mg(FeO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.912
_cell_length_b   5.912
_cell_length_c   8.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   292.433
_cell_formula_units_Z   4
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  0.248  0.500  0.750  1.0
  Mg  Mg1  1  0.500  0.752  0.500  1.0
  Mg  Mg2  1  0.752  0.500  0.250  1.0
  Mg  Mg3  1  0.500  0.248  0.000  1.0
  Fe  Fe4  1  0.248  0.000  0.750  1.0
  Fe  Fe5  1  0.751  0.249  0.625  1.0
  Fe  Fe6  1  0.752  0.000  0.250  1.0
  Fe  Fe7  1  0.249  0.751  0.125  1.0
  Fe  Fe8  1  0.751  0.751  0.875  1.0
  Fe  Fe9  1  0.000  0.752  0.500  1.0
  Fe  Fe10  1  0.249  0.249  0.375  1.0
  Fe  Fe11  1  0.000  0.248  0.000  1.0
  O  O12  1  0.519  0.238  0.250  1.0
  O  O13  1  0.762  0.014  0.013  1.0
  O  O14  1  0.986  0.238  0.237  1.0
  O  O15  1  0.238  0.014  0.987  1.0
  O  O16  1  0.481  0.238  0.750  1.0
  O  O17  1  0.014  0.238  0.763  1.0
  O  O18  1  0.986  0.762  0.263  1.0
  O  O19  1  0.014  0.762  0.737  1.0
  O  O20  1  0.481  0.762  0.750  1.0
  O  O21  1  0.762  0.519  0.500  1.0
  O  O22  1  0.762  0.481  0.000  1.0
  O  O23  1  0.519  0.762  0.250  1.0
  O  O24  1  0.762  0.986  0.487  1.0
  O  O25  1  0.238  0.481  1.000  1.0
  O  O26  1  0.238  0.519  0.500  1.0
  O  O27  1  0.238  0.986  0.513  1.0
[/CIF]
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The material structure described by MgFe2O4 is Spinel-like structured and crystallizes in the tetragonal P4_122 space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Fe(2)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(2)O4 tetrahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with four equivalent Mg(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with six equivalent Mg(1)O6 octahedra and corners with six equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-61°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(2), and two equivalent Fe(1) atoms. is represented by the CIF file [CIF]
data_Mg(FeO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.912
_cell_length_b   5.912
_cell_length_c   8.366
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   292.433
_cell_formula_units_Z   4
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  0.248  0.500  0.750  1.0
  Mg  Mg1  1  0.500  0.752  0.500  1.0
  Mg  Mg2  1  0.752  0.500  0.250  1.0
  Mg  Mg3  1  0.500  0.248  0.000  1.0
  Fe  Fe4  1  0.248  0.000  0.750  1.0
  Fe  Fe5  1  0.751  0.249  0.625  1.0
  Fe  Fe6  1  0.752  0.000  0.250  1.0
  Fe  Fe7  1  0.249  0.751  0.125  1.0
  Fe  Fe8  1  0.751  0.751  0.875  1.0
  Fe  Fe9  1  0.000  0.752  0.500  1.0
  Fe  Fe10  1  0.249  0.249  0.375  1.0
  Fe  Fe11  1  0.000  0.248  0.000  1.0
  O  O12  1  0.519  0.238  0.250  1.0
  O  O13  1  0.762  0.014  0.013  1.0
  O  O14  1  0.986  0.238  0.237  1.0
  O  O15  1  0.238  0.014  0.987  1.0
  O  O16  1  0.481  0.238  0.750  1.0
  O  O17  1  0.014  0.238  0.763  1.0
  O  O18  1  0.986  0.762  0.263  1.0
  O  O19  1  0.014  0.762  0.737  1.0
  O  O20  1  0.481  0.762  0.750  1.0
  O  O21  1  0.762  0.519  0.500  1.0
  O  O22  1  0.762  0.481  0.000  1.0
  O  O23  1  0.519  0.762  0.250  1.0
  O  O24  1  0.762  0.986  0.487  1.0
  O  O25  1  0.238  0.481  1.000  1.0
  O  O26  1  0.238  0.519  0.500  1.0
  O  O27  1  0.238  0.986  0.513  1.0
[/CIF]
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