The compound described by Mn2CrO4 is Spinel-like structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the second Cr site, Cr(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the third Cr site, Cr(3) is bonded to two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(4)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. In the fourth Cr site, Cr(4) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, and  an edgeedge with one Mn(5)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cr(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. In the fourth Mn site, Mn(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1), one Mn(2), one Mn(3), and one Mn(4) atom to form distorted OMn3Cr tetrahedra that share corners with two equivalent O(1)Mn3Cr tetrahedra,  a cornercorner with one O(6)Mn2Cr2 trigonal pyramid, corners with two equivalent O(4)Mn2Cr2 trigonal pyramids, and  an edgeedge with one O(4)Mn2Cr2 trigonal pyramid. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Cr(2), one Mn(2), one Mn(3), and one Mn(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(2), one Mn(2), and one Mn(3) atom. In the fourth O site, O(4) is bonded to one Cr(1), one Cr(2), one Mn(1), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share corners with two equivalent O(1)Mn3Cr tetrahedra, corners with three equivalent O(4)Mn2Cr2 trigonal pyramids, and  an edgeedge with one O(1)Mn3Cr tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Cr(4), one Mn(1), one Mn(2), and one Mn(5) atom. In the sixth O site, O(6) is bonded to one Cr(3), one Cr(4), one Mn(3), and one Mn(5) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(1)Mn3Cr tetrahedra and corners with three equivalent O(6)Mn2Cr2 trigonal pyramids. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(4), one Mn(1), and one Mn(2) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Mn(1), one Mn(2), and one Mn(5) atom. is represented by the CIF file [CIF]
data_Mn2CrO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.938
_cell_length_b   5.964
_cell_length_c   10.365
_cell_angle_alpha   75.448
_cell_angle_beta   74.330
_cell_angle_gamma   61.359
_symmetry_Int_Tables_number   1
_cell_volume   306.931
_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
  Mn  Mn0  1  0.565  0.564  0.810  1.0
  Mn  Mn1  1  0.236  0.264  0.750  1.0
  Mn  Mn2  1  0.924  0.946  0.690  1.0
  Mn  Mn3  1  0.500  0.000  0.500  1.0
  Mn  Mn4  1  0.076  0.054  0.310  1.0
  Mn  Mn5  1  0.435  0.436  0.190  1.0
  Mn  Mn6  1  0.764  0.736  0.250  1.0
  Mn  Mn7  1  0.500  0.000  0.000  1.0
  Cr  Cr8  1  0.500  0.500  0.500  1.0
  Cr  Cr9  1  0.000  0.500  0.500  1.0
  Cr  Cr10  1  0.000  0.500  0.000  1.0
  Cr  Cr11  1  0.000  0.000  0.000  1.0
  O  O12  1  0.578  0.156  0.620  1.0
  O  O13  1  0.113  0.170  0.629  1.0
  O  O14  1  0.858  0.380  0.393  1.0
  O  O15  1  0.368  0.352  0.398  1.0
  O  O16  1  0.632  0.648  0.602  1.0
  O  O17  1  0.142  0.620  0.607  1.0
  O  O18  1  0.887  0.830  0.371  1.0
  O  O19  1  0.422  0.844  0.380  1.0
  O  O20  1  0.640  0.107  0.108  1.0
  O  O21  1  0.136  0.141  0.103  1.0
  O  O22  1  0.907  0.346  0.884  1.0
  O  O23  1  0.093  0.654  0.116  1.0
  O  O24  1  0.340  0.378  0.872  1.0
  O  O25  1  0.660  0.622  0.128  1.0
  O  O26  1  0.360  0.893  0.892  1.0
  O  O27  1  0.864  0.859  0.897  1.0
[/CIF]
.
The compound described by Mn2CrO4 is Spinel-like structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the second Cr site, Cr(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the third Cr site, Cr(3) is bonded to two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(4)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. In the fourth Cr site, Cr(4) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-63°. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent Mn(1)O4 tetrahedra, corners with three equivalent Mn(3)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, and  an edgeedge with one Mn(5)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(3)O6 octahedra,  a cornercorner with one Cr(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. In the fourth Mn site, Mn(4) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Mn(3)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(2)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1), one Mn(2), one Mn(3), and one Mn(4) atom to form distorted OMn3Cr tetrahedra that share corners with two equivalent O(1)Mn3Cr tetrahedra,  a cornercorner with one O(6)Mn2Cr2 trigonal pyramid, corners with two equivalent O(4)Mn2Cr2 trigonal pyramids, and  an edgeedge with one O(4)Mn2Cr2 trigonal pyramid. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Cr(2), one Mn(2), one Mn(3), and one Mn(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(2), one Mn(2), and one Mn(3) atom. In the fourth O site, O(4) is bonded to one Cr(1), one Cr(2), one Mn(1), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share corners with two equivalent O(1)Mn3Cr tetrahedra, corners with three equivalent O(4)Mn2Cr2 trigonal pyramids, and  an edgeedge with one O(1)Mn3Cr tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Cr(4), one Mn(1), one Mn(2), and one Mn(5) atom. In the sixth O site, O(6) is bonded to one Cr(3), one Cr(4), one Mn(3), and one Mn(5) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(1)Mn3Cr tetrahedra and corners with three equivalent O(6)Mn2Cr2 trigonal pyramids. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(4), one Mn(1), and one Mn(2) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Mn(1), one Mn(2), and one Mn(5) atom. is represented by the CIF file [CIF]
data_Mn2CrO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.938
_cell_length_b   5.964
_cell_length_c   10.365
_cell_angle_alpha   75.448
_cell_angle_beta   74.330
_cell_angle_gamma   61.359
_symmetry_Int_Tables_number   1
_cell_volume   306.931
_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
  Mn  Mn0  1  0.565  0.564  0.810  1.0
  Mn  Mn1  1  0.236  0.264  0.750  1.0
  Mn  Mn2  1  0.924  0.946  0.690  1.0
  Mn  Mn3  1  0.500  0.000  0.500  1.0
  Mn  Mn4  1  0.076  0.054  0.310  1.0
  Mn  Mn5  1  0.435  0.436  0.190  1.0
  Mn  Mn6  1  0.764  0.736  0.250  1.0
  Mn  Mn7  1  0.500  0.000  0.000  1.0
  Cr  Cr8  1  0.500  0.500  0.500  1.0
  Cr  Cr9  1  0.000  0.500  0.500  1.0
  Cr  Cr10  1  0.000  0.500  0.000  1.0
  Cr  Cr11  1  0.000  0.000  0.000  1.0
  O  O12  1  0.578  0.156  0.620  1.0
  O  O13  1  0.113  0.170  0.629  1.0
  O  O14  1  0.858  0.380  0.393  1.0
  O  O15  1  0.368  0.352  0.398  1.0
  O  O16  1  0.632  0.648  0.602  1.0
  O  O17  1  0.142  0.620  0.607  1.0
  O  O18  1  0.887  0.830  0.371  1.0
  O  O19  1  0.422  0.844  0.380  1.0
  O  O20  1  0.640  0.107  0.108  1.0
  O  O21  1  0.136  0.141  0.103  1.0
  O  O22  1  0.907  0.346  0.884  1.0
  O  O23  1  0.093  0.654  0.116  1.0
  O  O24  1  0.340  0.378  0.872  1.0
  O  O25  1  0.660  0.622  0.128  1.0
  O  O26  1  0.360  0.893  0.892  1.0
  O  O27  1  0.864  0.859  0.897  1.0
[/CIF]
.