The material structure described by MgCr2(Fe2O5)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted MgO6 octahedra that share corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with four equivalent Cr(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Fe(2)O5 trigonal bipyramids. Cr(1) is bonded to one O(1), one O(3), one O(4), and two equivalent O(5) atoms to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Cr(1)O5 trigonal bipyramids, corners with three equivalent Fe(2)O5 trigonal bipyramids, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(5), two equivalent O(4), and three equivalent O(1) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra,  a cornercorner with one Cr(1)O5 trigonal bipyramid,  a cornercorner with one Fe(2)O5 trigonal bipyramid, edges with three equivalent Fe(1)O6 octahedra, and edges with three equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 35°. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), and three equivalent O(2) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with three equivalent Cr(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 68-74°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1) and three equivalent Fe(1) atoms to form OCrFe3 trigonal pyramids that share  a cornercorner with one O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(3)Mg2CrFe trigonal pyramid, corners with two equivalent O(1)CrFe3 trigonal pyramids, edges with two equivalent O(5)Cr2Fe2 tetrahedra, and edges with two equivalent O(1)CrFe3 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Fe(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1), one Cr(1), and one Fe(2) atom to form distorted OMg2CrFe trigonal pyramids that share corners with three equivalent O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(1)CrFe3 trigonal pyramid, corners with four equivalent O(3)Mg2CrFe trigonal pyramids, and  an edgeedge with one O(3)Mg2CrFe trigonal pyramid. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Cr(1), one Fe(1), and one Fe(2) atom to form distorted OCr2Fe2 tetrahedra that share corners with two equivalent O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(1)CrFe3 trigonal pyramid, corners with three equivalent O(3)Mg2CrFe trigonal pyramids, and edges with two equivalent O(1)CrFe3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.856
_cell_length_b   5.350
_cell_length_c   10.502
_cell_angle_alpha   95.674
_cell_angle_beta   90.000
_cell_angle_gamma   111.125
_symmetry_Int_Tables_number   1
_cell_volume   200.946
_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  0.500  0.000  0.000  1.0
  Cr  Cr1  1  0.161  0.323  0.265  1.0
  Cr  Cr2  1  0.839  0.677  0.735  1.0
  Fe  Fe3  1  0.144  0.289  0.553  1.0
  Fe  Fe4  1  0.173  0.346  0.896  1.0
  Fe  Fe5  1  0.856  0.711  0.447  1.0
  Fe  Fe6  1  0.827  0.654  0.104  1.0
  O  O7  1  0.297  0.595  0.423  1.0
  O  O8  1  0.313  0.626  0.063  1.0
  O  O9  1  0.020  0.040  0.119  1.0
  O  O10  1  0.032  0.063  0.386  1.0
  O  O11  1  0.281  0.561  0.751  1.0
  O  O12  1  0.719  0.439  0.249  1.0
  O  O13  1  0.968  0.937  0.614  1.0
  O  O14  1  0.703  0.405  0.577  1.0
  O  O15  1  0.687  0.374  0.937  1.0
  O  O16  1  0.980  0.960  0.881  1.0
[/CIF]
.
The material structure described by MgCr2(Fe2O5)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form distorted MgO6 octahedra that share corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with four equivalent Cr(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with four equivalent Fe(2)O5 trigonal bipyramids. Cr(1) is bonded to one O(1), one O(3), one O(4), and two equivalent O(5) atoms to form distorted CrO5 trigonal bipyramids that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Cr(1)O5 trigonal bipyramids, corners with three equivalent Fe(2)O5 trigonal bipyramids, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(5), two equivalent O(4), and three equivalent O(1) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra,  a cornercorner with one Cr(1)O5 trigonal bipyramid,  a cornercorner with one Fe(2)O5 trigonal bipyramid, edges with three equivalent Fe(1)O6 octahedra, and edges with three equivalent Cr(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 35°. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), and three equivalent O(2) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Fe(2)O5 trigonal bipyramids, corners with three equivalent Cr(1)O5 trigonal bipyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 68-74°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1) and three equivalent Fe(1) atoms to form OCrFe3 trigonal pyramids that share  a cornercorner with one O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(3)Mg2CrFe trigonal pyramid, corners with two equivalent O(1)CrFe3 trigonal pyramids, edges with two equivalent O(5)Cr2Fe2 tetrahedra, and edges with two equivalent O(1)CrFe3 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Fe(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1), one Cr(1), and one Fe(2) atom to form distorted OMg2CrFe trigonal pyramids that share corners with three equivalent O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(1)CrFe3 trigonal pyramid, corners with four equivalent O(3)Mg2CrFe trigonal pyramids, and  an edgeedge with one O(3)Mg2CrFe trigonal pyramid. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Cr(1), one Fe(1), and one Fe(2) atom to form distorted OCr2Fe2 tetrahedra that share corners with two equivalent O(5)Cr2Fe2 tetrahedra,  a cornercorner with one O(1)CrFe3 trigonal pyramid, corners with three equivalent O(3)Mg2CrFe trigonal pyramids, and edges with two equivalent O(1)CrFe3 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.856
_cell_length_b   5.350
_cell_length_c   10.502
_cell_angle_alpha   95.674
_cell_angle_beta   90.000
_cell_angle_gamma   111.125
_symmetry_Int_Tables_number   1
_cell_volume   200.946
_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  0.500  0.000  0.000  1.0
  Cr  Cr1  1  0.161  0.323  0.265  1.0
  Cr  Cr2  1  0.839  0.677  0.735  1.0
  Fe  Fe3  1  0.144  0.289  0.553  1.0
  Fe  Fe4  1  0.173  0.346  0.896  1.0
  Fe  Fe5  1  0.856  0.711  0.447  1.0
  Fe  Fe6  1  0.827  0.654  0.104  1.0
  O  O7  1  0.297  0.595  0.423  1.0
  O  O8  1  0.313  0.626  0.063  1.0
  O  O9  1  0.020  0.040  0.119  1.0
  O  O10  1  0.032  0.063  0.386  1.0
  O  O11  1  0.281  0.561  0.751  1.0
  O  O12  1  0.719  0.439  0.249  1.0
  O  O13  1  0.968  0.937  0.614  1.0
  O  O14  1  0.703  0.405  0.577  1.0
  O  O15  1  0.687  0.374  0.937  1.0
  O  O16  1  0.980  0.960  0.881  1.0
[/CIF]
.