The structure described by Fe7(CoO6)2 is Spinel-like structured and crystallizes in the monoclinic C2/c space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form FeO4 tetrahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, and corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-60°. In the second Fe site, Fe(2) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form FeO4 tetrahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, and corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the third Fe site, Fe(3) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(4)O6 octahedra, edges with two equivalent Fe(5)O6 octahedra, and edges with two equivalent Co(1)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(5)O6 octahedra, and edges with two equivalent Co(1)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and edges with three equivalent Co(1)O6 octahedra. Co(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with three equivalent Fe(5)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(5), and one Co(1) atom. In the second O site, O(2) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Fe(5) atom to form distorted corner-sharing OFe4 trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Fe(2), one Fe(4), one Fe(5), and one Co(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(5), and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Fe(2), one Fe(3), one Fe(5), and one Co(1) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), one Fe(4), and one Co(1) atom. is represented by the CIF card [CIF]
data_Fe7(CoO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.025
_cell_length_b   6.025
_cell_length_c   13.471
_cell_angle_alpha   77.565
_cell_angle_beta   77.565
_cell_angle_gamma   89.950
_symmetry_Int_Tables_number   1
_cell_volume   465.881
_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
  Fe  Fe0  1  0.289  0.040  0.417  1.0
  Fe  Fe1  1  0.960  0.711  0.083  1.0
  Fe  Fe2  1  0.626  0.374  0.750  1.0
  Fe  Fe3  1  0.040  0.289  0.917  1.0
  Fe  Fe4  1  0.711  0.960  0.583  1.0
  Fe  Fe5  1  0.374  0.626  0.250  1.0
  Fe  Fe6  1  0.500  0.500  0.000  1.0
  Fe  Fe7  1  0.500  0.500  0.500  1.0
  Fe  Fe8  1  0.000  0.500  0.500  1.0
  Fe  Fe9  1  0.670  0.166  0.172  1.0
  Fe  Fe10  1  0.330  0.834  0.828  1.0
  Fe  Fe11  1  0.166  0.670  0.672  1.0
  Fe  Fe12  1  0.834  0.330  0.328  1.0
  Fe  Fe13  1  0.500  0.000  0.000  1.0
  Co  Co14  1  0.165  0.170  0.666  1.0
  Co  Co15  1  0.835  0.830  0.334  1.0
  Co  Co16  1  0.170  0.165  0.166  1.0
  Co  Co17  1  0.830  0.835  0.834  1.0
  O  O18  1  0.084  0.590  0.832  1.0
  O  O19  1  0.752  0.269  0.497  1.0
  O  O20  1  0.424  0.929  0.160  1.0
  O  O21  1  0.410  0.916  0.668  1.0
  O  O22  1  0.071  0.576  0.340  1.0
  O  O23  1  0.731  0.248  0.003  1.0
  O  O24  1  0.928  0.914  0.668  1.0
  O  O25  1  0.589  0.575  0.340  1.0
  O  O26  1  0.270  0.251  0.001  1.0
  O  O27  1  0.086  0.072  0.832  1.0
  O  O28  1  0.749  0.730  0.499  1.0
  O  O29  1  0.425  0.411  0.160  1.0
  O  O30  1  0.248  0.731  0.503  1.0
  O  O31  1  0.916  0.410  0.168  1.0
  O  O32  1  0.576  0.071  0.840  1.0
  O  O33  1  0.929  0.424  0.660  1.0
  O  O34  1  0.590  0.084  0.332  1.0
  O  O35  1  0.269  0.752  0.997  1.0
  O  O36  1  0.411  0.425  0.660  1.0
  O  O37  1  0.072  0.086  0.332  1.0
  O  O38  1  0.730  0.749  0.999  1.0
  O  O39  1  0.251  0.270  0.501  1.0
  O  O40  1  0.914  0.928  0.168  1.0
  O  O41  1  0.575  0.589  0.840  1.0
[/CIF]
.
The structure described by Fe7(CoO6)2 is Spinel-like structured and crystallizes in the monoclinic C2/c space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form FeO4 tetrahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, and corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-60°. In the second Fe site, Fe(2) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form FeO4 tetrahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, and corners with four equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the third Fe site, Fe(3) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(4)O6 octahedra, edges with two equivalent Fe(5)O6 octahedra, and edges with two equivalent Co(1)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(5)O6 octahedra, and edges with two equivalent Co(1)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and edges with three equivalent Co(1)O6 octahedra. Co(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with two equivalent Fe(2)O4 tetrahedra, corners with four equivalent Fe(1)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with three equivalent Fe(5)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), two equivalent Fe(5), and one Co(1) atom. In the second O site, O(2) is bonded to one Fe(1), one Fe(3), one Fe(4), and one Fe(5) atom to form distorted corner-sharing OFe4 trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Fe(2), one Fe(4), one Fe(5), and one Co(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(5), and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Fe(2), one Fe(3), one Fe(5), and one Co(1) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(3), one Fe(4), and one Co(1) atom. is represented by the CIF card [CIF]
data_Fe7(CoO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.025
_cell_length_b   6.025
_cell_length_c   13.471
_cell_angle_alpha   77.565
_cell_angle_beta   77.565
_cell_angle_gamma   89.950
_symmetry_Int_Tables_number   1
_cell_volume   465.881
_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
  Fe  Fe0  1  0.289  0.040  0.417  1.0
  Fe  Fe1  1  0.960  0.711  0.083  1.0
  Fe  Fe2  1  0.626  0.374  0.750  1.0
  Fe  Fe3  1  0.040  0.289  0.917  1.0
  Fe  Fe4  1  0.711  0.960  0.583  1.0
  Fe  Fe5  1  0.374  0.626  0.250  1.0
  Fe  Fe6  1  0.500  0.500  0.000  1.0
  Fe  Fe7  1  0.500  0.500  0.500  1.0
  Fe  Fe8  1  0.000  0.500  0.500  1.0
  Fe  Fe9  1  0.670  0.166  0.172  1.0
  Fe  Fe10  1  0.330  0.834  0.828  1.0
  Fe  Fe11  1  0.166  0.670  0.672  1.0
  Fe  Fe12  1  0.834  0.330  0.328  1.0
  Fe  Fe13  1  0.500  0.000  0.000  1.0
  Co  Co14  1  0.165  0.170  0.666  1.0
  Co  Co15  1  0.835  0.830  0.334  1.0
  Co  Co16  1  0.170  0.165  0.166  1.0
  Co  Co17  1  0.830  0.835  0.834  1.0
  O  O18  1  0.084  0.590  0.832  1.0
  O  O19  1  0.752  0.269  0.497  1.0
  O  O20  1  0.424  0.929  0.160  1.0
  O  O21  1  0.410  0.916  0.668  1.0
  O  O22  1  0.071  0.576  0.340  1.0
  O  O23  1  0.731  0.248  0.003  1.0
  O  O24  1  0.928  0.914  0.668  1.0
  O  O25  1  0.589  0.575  0.340  1.0
  O  O26  1  0.270  0.251  0.001  1.0
  O  O27  1  0.086  0.072  0.832  1.0
  O  O28  1  0.749  0.730  0.499  1.0
  O  O29  1  0.425  0.411  0.160  1.0
  O  O30  1  0.248  0.731  0.503  1.0
  O  O31  1  0.916  0.410  0.168  1.0
  O  O32  1  0.576  0.071  0.840  1.0
  O  O33  1  0.929  0.424  0.660  1.0
  O  O34  1  0.590  0.084  0.332  1.0
  O  O35  1  0.269  0.752  0.997  1.0
  O  O36  1  0.411  0.425  0.660  1.0
  O  O37  1  0.072  0.086  0.332  1.0
  O  O38  1  0.730  0.749  0.999  1.0
  O  O39  1  0.251  0.270  0.501  1.0
  O  O40  1  0.914  0.928  0.168  1.0
  O  O41  1  0.575  0.589  0.840  1.0
[/CIF]
.