The structure described by CrMn3O8 is trigonal omega-derived structured and crystallizes in the trigonal R-3m space group. Cr(1) is bonded to six equivalent O(2) atoms to form CrO6 octahedra that share edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share edges with two equivalent Cr(1)O6 octahedra and edges with four equivalent Mn(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Cr(1) and two equivalent Mn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn3CrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.841
_cell_length_b   5.841
_cell_length_c   5.841
_cell_angle_alpha   59.947
_cell_angle_beta   59.947
_cell_angle_gamma   59.947
_symmetry_Int_Tables_number   1
_cell_volume   140.748
_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
  Mn  Mn0  1  0.000  0.500  0.500  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.000  0.500  1.0
  Cr  Cr3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.266  0.266  0.266  1.0
  O  O5  1  0.703  0.265  0.265  1.0
  O  O6  1  0.265  0.265  0.703  1.0
  O  O7  1  0.265  0.703  0.265  1.0
  O  O8  1  0.735  0.297  0.735  1.0
  O  O9  1  0.735  0.735  0.297  1.0
  O  O10  1  0.734  0.734  0.734  1.0
  O  O11  1  0.297  0.735  0.735  1.0
[/CIF]
.
The structure described by CrMn3O8 is trigonal omega-derived structured and crystallizes in the trigonal R-3m space group. Cr(1) is bonded to six equivalent O(2) atoms to form CrO6 octahedra that share edges with six equivalent Mn(1)O6 octahedra. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share edges with two equivalent Cr(1)O6 octahedra and edges with four equivalent Mn(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Cr(1) and two equivalent Mn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mn3CrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.841
_cell_length_b   5.841
_cell_length_c   5.841
_cell_angle_alpha   59.947
_cell_angle_beta   59.947
_cell_angle_gamma   59.947
_symmetry_Int_Tables_number   1
_cell_volume   140.748
_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
  Mn  Mn0  1  0.000  0.500  0.500  1.0
  Mn  Mn1  1  0.500  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.000  0.500  1.0
  Cr  Cr3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.266  0.266  0.266  1.0
  O  O5  1  0.703  0.265  0.265  1.0
  O  O6  1  0.265  0.265  0.703  1.0
  O  O7  1  0.265  0.703  0.265  1.0
  O  O8  1  0.735  0.297  0.735  1.0
  O  O9  1  0.735  0.735  0.297  1.0
  O  O10  1  0.734  0.734  0.734  1.0
  O  O11  1  0.297  0.735  0.735  1.0
[/CIF]
.