The structure described by CoFe2O4 is Spinel-like structured and crystallizes in the trigonal P3_121 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-59°. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(2), and one Co(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(2), and one Co(1) atom. is represented by the CIF card [CIF]
data_Fe2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.039
_cell_length_b   6.039
_cell_length_c   14.729
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   465.256
_cell_formula_units_Z   6
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
  Fe  Fe0  1  0.666  0.664  0.876  1.0
  Fe  Fe1  1  0.166  0.667  0.999  1.0
  Fe  Fe2  1  0.336  0.003  0.210  1.0
  Fe  Fe3  1  0.667  0.166  0.001  1.0
  Fe  Fe4  1  0.834  0.501  0.334  1.0
  Fe  Fe5  1  0.997  0.334  0.543  1.0
  Fe  Fe6  1  0.333  0.499  0.333  1.0
  Fe  Fe7  1  0.664  0.666  0.124  1.0
  Fe  Fe8  1  0.499  0.333  0.667  1.0
  Fe  Fe9  1  0.334  0.997  0.457  1.0
  Fe  Fe10  1  0.501  0.834  0.666  1.0
  Fe  Fe11  1  0.003  0.336  0.790  1.0
  Co  Co12  1  0.330  0.000  0.833  1.0
  Co  Co13  1  0.000  0.330  0.167  1.0
  Co  Co14  1  0.833  0.000  0.333  1.0
  Co  Co15  1  0.167  0.167  0.000  1.0
  Co  Co16  1  0.670  0.670  0.500  1.0
  Co  Co17  1  0.000  0.833  0.667  1.0
  O  O18  1  0.012  0.833  0.920  1.0
  O  O19  1  0.499  0.317  0.920  1.0
  O  O20  1  0.338  0.995  0.077  1.0
  O  O21  1  0.493  0.840  0.922  1.0
  O  O22  1  0.840  0.493  0.078  1.0
  O  O23  1  0.683  0.182  0.253  1.0
  O  O24  1  0.995  0.338  0.923  1.0
  O  O25  1  0.833  0.012  0.080  1.0
  O  O26  1  0.160  0.652  0.256  1.0
  O  O27  1  0.005  0.343  0.411  1.0
  O  O28  1  0.317  0.499  0.080  1.0
  O  O29  1  0.167  0.179  0.254  1.0
  O  O30  1  0.501  0.818  0.413  1.0
  O  O31  1  0.348  0.507  0.589  1.0
  O  O32  1  0.507  0.348  0.411  1.0
  O  O33  1  0.662  0.657  0.256  1.0
  O  O34  1  0.821  0.988  0.587  1.0
  O  O35  1  0.657  0.662  0.744  1.0
  O  O36  1  0.988  0.821  0.413  1.0
  O  O37  1  0.818  0.501  0.587  1.0
  O  O38  1  0.179  0.167  0.746  1.0
  O  O39  1  0.343  0.005  0.589  1.0
  O  O40  1  0.182  0.683  0.747  1.0
  O  O41  1  0.652  0.160  0.744  1.0
[/CIF]
.
The structure described by CoFe2O4 is Spinel-like structured and crystallizes in the trigonal P3_121 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-59°. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(2), and one Co(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(2), and one Co(1) atom. is represented by the CIF card [CIF]
data_Fe2CoO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.039
_cell_length_b   6.039
_cell_length_c   14.729
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   465.256
_cell_formula_units_Z   6
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
  Fe  Fe0  1  0.666  0.664  0.876  1.0
  Fe  Fe1  1  0.166  0.667  0.999  1.0
  Fe  Fe2  1  0.336  0.003  0.210  1.0
  Fe  Fe3  1  0.667  0.166  0.001  1.0
  Fe  Fe4  1  0.834  0.501  0.334  1.0
  Fe  Fe5  1  0.997  0.334  0.543  1.0
  Fe  Fe6  1  0.333  0.499  0.333  1.0
  Fe  Fe7  1  0.664  0.666  0.124  1.0
  Fe  Fe8  1  0.499  0.333  0.667  1.0
  Fe  Fe9  1  0.334  0.997  0.457  1.0
  Fe  Fe10  1  0.501  0.834  0.666  1.0
  Fe  Fe11  1  0.003  0.336  0.790  1.0
  Co  Co12  1  0.330  0.000  0.833  1.0
  Co  Co13  1  0.000  0.330  0.167  1.0
  Co  Co14  1  0.833  0.000  0.333  1.0
  Co  Co15  1  0.167  0.167  0.000  1.0
  Co  Co16  1  0.670  0.670  0.500  1.0
  Co  Co17  1  0.000  0.833  0.667  1.0
  O  O18  1  0.012  0.833  0.920  1.0
  O  O19  1  0.499  0.317  0.920  1.0
  O  O20  1  0.338  0.995  0.077  1.0
  O  O21  1  0.493  0.840  0.922  1.0
  O  O22  1  0.840  0.493  0.078  1.0
  O  O23  1  0.683  0.182  0.253  1.0
  O  O24  1  0.995  0.338  0.923  1.0
  O  O25  1  0.833  0.012  0.080  1.0
  O  O26  1  0.160  0.652  0.256  1.0
  O  O27  1  0.005  0.343  0.411  1.0
  O  O28  1  0.317  0.499  0.080  1.0
  O  O29  1  0.167  0.179  0.254  1.0
  O  O30  1  0.501  0.818  0.413  1.0
  O  O31  1  0.348  0.507  0.589  1.0
  O  O32  1  0.507  0.348  0.411  1.0
  O  O33  1  0.662  0.657  0.256  1.0
  O  O34  1  0.821  0.988  0.587  1.0
  O  O35  1  0.657  0.662  0.744  1.0
  O  O36  1  0.988  0.821  0.413  1.0
  O  O37  1  0.818  0.501  0.587  1.0
  O  O38  1  0.179  0.167  0.746  1.0
  O  O39  1  0.343  0.005  0.589  1.0
  O  O40  1  0.182  0.683  0.747  1.0
  O  O41  1  0.652  0.160  0.744  1.0
[/CIF]
.