The material described by MgCr2(Fe2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  a faceface with one Cr(2)O6 octahedra, and  a faceface with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-57°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(10), one O(3), one O(4), one O(7), and one O(8) atom to form CrO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-61°. In the second Cr site, Cr(2) is bonded to one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted CrO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-61°. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the second Fe site, Fe(2) is bonded to one O(10), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and  a faceface with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. In the third Fe site, Fe(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and  a faceface with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-59°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Cr(1), one Fe(1), and one Fe(3) atom to form OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(5)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one Cr(2), one Fe(2), and one Fe(4) atom to form distorted OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(5)MgCrFe3 trigonal bipyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids, corners with three equivalent O(7)Cr2Fe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid, and edges with two equivalent O(6)MgCrFe3 trigonal bipyramids. In the third O site, O(3) is bonded to one Cr(1), one Fe(1), one Fe(2), and one Fe(3) atom to form OCrFe3 trigonal pyramids that share  a cornercorner with one O(4)MgCr2Fe2 trigonal bipyramid, corners with two equivalent O(6)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid, and  an edgeedge with one O(1)MgCrFe2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Cr(1), one Cr(2), one Fe(1), and one Fe(3) atom to form distorted OMgCr2Fe2 trigonal bipyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid, corners with two equivalent O(7)Cr2Fe2 trigonal pyramids, corners with two equivalent O(1)MgCrFe2 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, edges with two equivalent O(5)MgCrFe3 trigonal bipyramids,  an edgeedge with one O(3)CrFe3 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Cr(2), one Fe(1), one Fe(3), and one Fe(4) atom to form distorted OMgCrFe3 trigonal bipyramids that share corners with two equivalent O(6)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, edges with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Cr(2), one Fe(1), one Fe(2), and one Fe(4) atom to form distorted OMgCrFe3 trigonal bipyramids that share  a cornercorner with one O(4)MgCr2Fe2 trigonal bipyramid, corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(3)CrFe3 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(9)MgCrFe2 trigonal pyramid, and edges with two equivalent O(2)MgCrFe2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Cr(1), one Cr(2), one Fe(2), and one Fe(4) atom to form distorted OCr2Fe2 trigonal pyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with three equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid, and  an edgeedge with one O(8)CrFe3 trigonal pyramid. In the eighth O site, O(8) is bonded to one Cr(1), one Fe(2), one Fe(3), and one Fe(4) atom to form OCrFe3 trigonal pyramids that share corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(1)MgCrFe2 trigonal pyramids, corners with two equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid, and  an edgeedge with one O(3)CrFe3 trigonal pyramid. In the ninth O site, O(9) is bonded to one Mg(1), one Cr(2), one Fe(1), and one Fe(3) atom to form distorted OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids, corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid, corners with two equivalent O(3)CrFe3 trigonal pyramids, corners with two equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, and  an edgeedge with one O(1)MgCrFe2 trigonal pyramid. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Cr(1), one Fe(2), and one Fe(4) atom. is represented by the CIF card [CIF]
data_MgCr2(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.737
_cell_length_b   5.743
_cell_length_c   7.516
_cell_angle_alpha   70.031
_cell_angle_beta   109.931
_cell_angle_gamma   126.907
_symmetry_Int_Tables_number   1
_cell_volume   183.046
_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  0.190  0.814  0.905  1.0
  Cr  Cr1  1  0.999  0.015  0.484  1.0
  Cr  Cr2  1  0.983  0.042  0.010  1.0
  Fe  Fe3  1  0.393  0.621  0.763  1.0
  Fe  Fe4  1  0.376  0.648  0.290  1.0
  Fe  Fe5  1  0.633  0.379  0.679  1.0
  Fe  Fe6  1  0.626  0.386  0.208  1.0
  O  O7  1  0.341  0.966  0.655  1.0
  O  O8  1  0.033  0.689  0.144  1.0
  O  O9  1  0.264  0.424  0.549  1.0
  O  O10  1  0.817  0.812  0.743  1.0
  O  O11  1  0.395  0.251  0.944  1.0
  O  O12  1  0.553  0.767  0.034  1.0
  O  O13  1  0.193  0.223  0.245  1.0
  O  O14  1  0.743  0.601  0.426  1.0
  O  O15  1  0.983  0.395  0.840  1.0
  O  O16  1  0.657  0.052  0.339  1.0
[/CIF]
.
The material described by MgCr2(Fe2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(9) atom to form MgO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra,  a faceface with one Cr(2)O6 octahedra, and  a faceface with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-57°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(10), one O(3), one O(4), one O(7), and one O(8) atom to form CrO6 octahedra that share corners with two equivalent Cr(2)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-61°. In the second Cr site, Cr(2) is bonded to one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted CrO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-61°. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the second Fe site, Fe(2) is bonded to one O(10), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and  a faceface with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. In the third Fe site, Fe(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and  a faceface with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-59°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Cr(1), one Fe(1), and one Fe(3) atom to form OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(5)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one Cr(2), one Fe(2), and one Fe(4) atom to form distorted OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(5)MgCrFe3 trigonal bipyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids, corners with three equivalent O(7)Cr2Fe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid, and edges with two equivalent O(6)MgCrFe3 trigonal bipyramids. In the third O site, O(3) is bonded to one Cr(1), one Fe(1), one Fe(2), and one Fe(3) atom to form OCrFe3 trigonal pyramids that share  a cornercorner with one O(4)MgCr2Fe2 trigonal bipyramid, corners with two equivalent O(6)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid, and  an edgeedge with one O(1)MgCrFe2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Cr(1), one Cr(2), one Fe(1), and one Fe(3) atom to form distorted OMgCr2Fe2 trigonal bipyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid, corners with two equivalent O(7)Cr2Fe2 trigonal pyramids, corners with two equivalent O(1)MgCrFe2 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, edges with two equivalent O(5)MgCrFe3 trigonal bipyramids,  an edgeedge with one O(3)CrFe3 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Cr(2), one Fe(1), one Fe(3), and one Fe(4) atom to form distorted OMgCrFe3 trigonal bipyramids that share corners with two equivalent O(6)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(2)MgCrFe2 trigonal pyramid, corners with two equivalent O(8)CrFe3 trigonal pyramids, corners with two equivalent O(9)MgCrFe2 trigonal pyramids,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, edges with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(2)MgCrFe2 trigonal pyramid, and  an edgeedge with one O(9)MgCrFe2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Cr(2), one Fe(1), one Fe(2), and one Fe(4) atom to form distorted OMgCrFe3 trigonal bipyramids that share  a cornercorner with one O(4)MgCr2Fe2 trigonal bipyramid, corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(3)CrFe3 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid,  an edgeedge with one O(8)CrFe3 trigonal pyramid,  an edgeedge with one O(1)MgCrFe2 trigonal pyramid,  an edgeedge with one O(9)MgCrFe2 trigonal pyramid, and edges with two equivalent O(2)MgCrFe2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Cr(1), one Cr(2), one Fe(2), and one Fe(4) atom to form distorted OCr2Fe2 trigonal pyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with three equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(3)CrFe3 trigonal pyramid, and  an edgeedge with one O(8)CrFe3 trigonal pyramid. In the eighth O site, O(8) is bonded to one Cr(1), one Fe(2), one Fe(3), and one Fe(4) atom to form OCrFe3 trigonal pyramids that share corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(3)CrFe3 trigonal pyramid,  a cornercorner with one O(9)MgCrFe2 trigonal pyramid, corners with two equivalent O(1)MgCrFe2 trigonal pyramids, corners with two equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(7)Cr2Fe2 trigonal pyramid, and  an edgeedge with one O(3)CrFe3 trigonal pyramid. In the ninth O site, O(9) is bonded to one Mg(1), one Cr(2), one Fe(1), and one Fe(3) atom to form distorted OMgCrFe2 trigonal pyramids that share  a cornercorner with one O(6)MgCrFe3 trigonal bipyramid, corners with two equivalent O(4)MgCr2Fe2 trigonal bipyramids, corners with two equivalent O(5)MgCrFe3 trigonal bipyramids,  a cornercorner with one O(7)Cr2Fe2 trigonal pyramid,  a cornercorner with one O(8)CrFe3 trigonal pyramid,  a cornercorner with one O(1)MgCrFe2 trigonal pyramid, corners with two equivalent O(3)CrFe3 trigonal pyramids, corners with two equivalent O(2)MgCrFe2 trigonal pyramids,  an edgeedge with one O(4)MgCr2Fe2 trigonal bipyramid,  an edgeedge with one O(5)MgCrFe3 trigonal bipyramid,  an edgeedge with one O(6)MgCrFe3 trigonal bipyramid, and  an edgeedge with one O(1)MgCrFe2 trigonal pyramid. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Cr(1), one Fe(2), and one Fe(4) atom. is represented by the CIF card [CIF]
data_MgCr2(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.737
_cell_length_b   5.743
_cell_length_c   7.516
_cell_angle_alpha   70.031
_cell_angle_beta   109.931
_cell_angle_gamma   126.907
_symmetry_Int_Tables_number   1
_cell_volume   183.046
_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  0.190  0.814  0.905  1.0
  Cr  Cr1  1  0.999  0.015  0.484  1.0
  Cr  Cr2  1  0.983  0.042  0.010  1.0
  Fe  Fe3  1  0.393  0.621  0.763  1.0
  Fe  Fe4  1  0.376  0.648  0.290  1.0
  Fe  Fe5  1  0.633  0.379  0.679  1.0
  Fe  Fe6  1  0.626  0.386  0.208  1.0
  O  O7  1  0.341  0.966  0.655  1.0
  O  O8  1  0.033  0.689  0.144  1.0
  O  O9  1  0.264  0.424  0.549  1.0
  O  O10  1  0.817  0.812  0.743  1.0
  O  O11  1  0.395  0.251  0.944  1.0
  O  O12  1  0.553  0.767  0.034  1.0
  O  O13  1  0.193  0.223  0.245  1.0
  O  O14  1  0.743  0.601  0.426  1.0
  O  O15  1  0.983  0.395  0.840  1.0
  O  O16  1  0.657  0.052  0.339  1.0
[/CIF]
.