The structure described by MgCr2O5 crystallizes in the orthorhombic Pmmn space group. Mg(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Cr(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing CrO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Cr(1) atoms to form corner-sharing OMg2Cr2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Cr(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_MgCr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.448
_cell_length_b   4.824
_cell_length_c   11.560
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   192.257
_cell_formula_units_Z   2
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  0.750  0.851  0.250  1.0
  Mg  Mg1  1  0.250  0.149  0.750  1.0
  Cr  Cr2  1  0.250  0.413  0.100  1.0
  Cr  Cr3  1  0.750  0.587  0.900  1.0
  Cr  Cr4  1  0.750  0.587  0.600  1.0
  Cr  Cr5  1  0.250  0.413  0.400  1.0
  O  O6  1  0.750  0.418  0.750  1.0
  O  O7  1  0.250  0.582  0.250  1.0
  O  O8  1  0.750  0.568  0.075  1.0
  O  O9  1  0.250  0.432  0.925  1.0
  O  O10  1  0.750  0.568  0.425  1.0
  O  O11  1  0.250  0.432  0.575  1.0
  O  O12  1  0.250  0.069  0.357  1.0
  O  O13  1  0.750  0.931  0.643  1.0
  O  O14  1  0.750  0.931  0.857  1.0
  O  O15  1  0.250  0.069  0.143  1.0
[/CIF]
.
The structure described by MgCr2O5 crystallizes in the orthorhombic Pmmn space group. Mg(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Cr(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing CrO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1) and two equivalent Cr(1) atoms to form corner-sharing OMg2Cr2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1) and three equivalent Cr(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_MgCr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.448
_cell_length_b   4.824
_cell_length_c   11.560
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   192.257
_cell_formula_units_Z   2
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  0.750  0.851  0.250  1.0
  Mg  Mg1  1  0.250  0.149  0.750  1.0
  Cr  Cr2  1  0.250  0.413  0.100  1.0
  Cr  Cr3  1  0.750  0.587  0.900  1.0
  Cr  Cr4  1  0.750  0.587  0.600  1.0
  Cr  Cr5  1  0.250  0.413  0.400  1.0
  O  O6  1  0.750  0.418  0.750  1.0
  O  O7  1  0.250  0.582  0.250  1.0
  O  O8  1  0.750  0.568  0.075  1.0
  O  O9  1  0.250  0.432  0.925  1.0
  O  O10  1  0.750  0.568  0.425  1.0
  O  O11  1  0.250  0.432  0.575  1.0
  O  O12  1  0.250  0.069  0.357  1.0
  O  O13  1  0.750  0.931  0.643  1.0
  O  O14  1  0.750  0.931  0.857  1.0
  O  O15  1  0.250  0.069  0.143  1.0
[/CIF]
.