The structure described by Co7Sb2O12 is Spinel-like structured and crystallizes in the monoclinic C2/m space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), and two equivalent O(7) atoms to form CoO4 tetrahedra that share corners with three equivalent Co(4)O6 octahedra, corners with three equivalent Sb(2)O6 octahedra, and corners with six equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the second Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(8) atoms to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(6)O6 octahedra, corners with two equivalent Sb(3)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-67°. In the third Co site, Co(3) is bonded to one O(2), one O(6), and two equivalent O(9) atoms to form CoO4 tetrahedra that share  a cornercorner with one Sb(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-61°. In the fourth Co site, Co(4) is bonded to one O(1), one O(3), two equivalent O(7), and two equivalent O(9) atoms to form CoO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and edges with four equivalent Co(6)O6 octahedra. In the fifth Co site, Co(5) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Co(5)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(3)O6 octahedra. In the sixth Co site, Co(6) is bonded to one O(1), one O(3), one O(4), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(5), one O(6), two equivalent O(8), and two equivalent O(9) atoms to form SbO6 octahedra that share corners with three equivalent Co(2)O4 tetrahedra, corners with three equivalent Co(3)O4 tetrahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. In the second Sb site, Sb(2) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SbO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(4)O6 octahedra, and edges with four equivalent Co(6)O6 octahedra. In the third Sb site, Sb(3) is bonded to two equivalent O(2) and four equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(5)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), one Co(4), and two equivalent Co(6) atoms. In the second O site, O(2) is bonded to one Co(3), two equivalent Co(5), and one Sb(3) atom to form a mixture of distorted edge and corner-sharing OCo3Sb trigonal pyramids. In the third O site, O(3) is bonded to one Co(1), one Co(4), and two equivalent Co(6) atoms to form distorted corner-sharing OCo4 tetrahedra. In the fourth O site, O(4) is bonded to one Co(1), two equivalent Co(6), and one Sb(2) atom to form distorted OCo3Sb trigonal pyramids that share corners with three equivalent O(3)Co4 tetrahedra,  a cornercorner with one O(4)Co3Sb trigonal pyramid, corners with four equivalent O(7)Co3Sb trigonal pyramids, and edges with two equivalent O(7)Co3Sb trigonal pyramids. In the fifth O site, O(5) is bonded to one Co(2), two equivalent Co(5), and one Sb(1) atom to form a mixture of edge and corner-sharing OCo3Sb tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(3), two equivalent Co(6), and one Sb(1) atom. In the seventh O site, O(7) is bonded to one Co(1), one Co(4), one Co(6), and one Sb(2) atom to form distorted OCo3Sb trigonal pyramids that share corners with three equivalent O(3)Co4 tetrahedra, corners with two equivalent O(4)Co3Sb trigonal pyramids, corners with three equivalent O(7)Co3Sb trigonal pyramids,  an edgeedge with one O(4)Co3Sb trigonal pyramid, and  an edgeedge with one O(7)Co3Sb trigonal pyramid. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(5), one Sb(1), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Co(3), one Co(4), one Co(6), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Co7(SbO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.106
_cell_length_b   6.106
_cell_length_c   15.346
_cell_angle_alpha   89.796
_cell_angle_beta   89.796
_cell_angle_gamma   59.665
_symmetry_Int_Tables_number   1
_cell_volume   493.723
_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
  Co  Co0  1  0.332  0.332  0.469  1.0
  Co  Co1  1  0.993  0.993  0.141  1.0
  Co  Co2  1  0.661  0.661  0.791  1.0
  Co  Co3  1  0.339  0.339  0.209  1.0
  Co  Co4  1  0.007  0.007  0.859  1.0
  Co  Co5  1  0.668  0.668  0.531  1.0
  Co  Co6  1  0.166  0.166  0.662  1.0
  Co  Co7  1  0.834  0.834  0.338  1.0
  Co  Co8  1  0.500  0.000  0.000  1.0
  Co  Co9  1  0.166  0.666  0.662  1.0
  Co  Co10  1  0.834  0.334  0.338  1.0
  Co  Co11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.666  0.166  0.662  1.0
  Co  Co13  1  0.334  0.834  0.338  1.0
  Sb  Sb14  1  0.672  0.672  0.172  1.0
  Sb  Sb15  1  0.328  0.328  0.828  1.0
  Sb  Sb16  1  0.000  0.000  0.500  1.0
  Sb  Sb17  1  0.500  0.500  0.000  1.0
  O  O18  1  0.998  0.998  0.264  1.0
  O  O19  1  0.659  0.659  0.930  1.0
  O  O20  1  0.331  0.331  0.598  1.0
  O  O21  1  0.152  0.152  0.420  1.0
  O  O22  1  0.815  0.815  0.083  1.0
  O  O23  1  0.483  0.483  0.755  1.0
  O  O24  1  0.154  0.694  0.421  1.0
  O  O25  1  0.808  0.359  0.082  1.0
  O  O26  1  0.491  0.020  0.756  1.0
  O  O27  1  0.694  0.154  0.421  1.0
  O  O28  1  0.359  0.808  0.082  1.0
  O  O29  1  0.020  0.491  0.756  1.0
  O  O30  1  0.669  0.669  0.402  1.0
  O  O31  1  0.341  0.341  0.070  1.0
  O  O32  1  0.002  0.002  0.736  1.0
  O  O33  1  0.517  0.517  0.245  1.0
  O  O34  1  0.185  0.185  0.917  1.0
  O  O35  1  0.848  0.848  0.580  1.0
  O  O36  1  0.509  0.980  0.244  1.0
  O  O37  1  0.192  0.641  0.918  1.0
  O  O38  1  0.846  0.306  0.579  1.0
  O  O39  1  0.980  0.509  0.244  1.0
  O  O40  1  0.641  0.192  0.918  1.0
  O  O41  1  0.306  0.846  0.579  1.0
[/CIF]
.
The structure described by Co7Sb2O12 is Spinel-like structured and crystallizes in the monoclinic C2/m space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), and two equivalent O(7) atoms to form CoO4 tetrahedra that share corners with three equivalent Co(4)O6 octahedra, corners with three equivalent Sb(2)O6 octahedra, and corners with six equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. In the second Co site, Co(2) is bonded to one O(1), one O(5), and two equivalent O(8) atoms to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(6)O6 octahedra, corners with two equivalent Sb(3)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Co(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-67°. In the third Co site, Co(3) is bonded to one O(2), one O(6), and two equivalent O(9) atoms to form CoO4 tetrahedra that share  a cornercorner with one Sb(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, corners with two equivalent Co(5)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Co(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-61°. In the fourth Co site, Co(4) is bonded to one O(1), one O(3), two equivalent O(7), and two equivalent O(9) atoms to form CoO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, and edges with four equivalent Co(6)O6 octahedra. In the fifth Co site, Co(5) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Co(5)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(3)O6 octahedra. In the sixth Co site, Co(6) is bonded to one O(1), one O(3), one O(4), one O(6), one O(7), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(2)O6 octahedra, edges with two equivalent Co(4)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(5), one O(6), two equivalent O(8), and two equivalent O(9) atoms to form SbO6 octahedra that share corners with three equivalent Co(2)O4 tetrahedra, corners with three equivalent Co(3)O4 tetrahedra,  an edgeedge with one Co(4)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, edges with two equivalent Co(5)O6 octahedra, and edges with two equivalent Co(6)O6 octahedra. In the second Sb site, Sb(2) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SbO6 octahedra that share corners with six equivalent Co(1)O4 tetrahedra, edges with two equivalent Co(4)O6 octahedra, and edges with four equivalent Co(6)O6 octahedra. In the third Sb site, Sb(3) is bonded to two equivalent O(2) and four equivalent O(8) atoms to form SbO6 octahedra that share corners with two equivalent Co(3)O4 tetrahedra, corners with four equivalent Co(2)O4 tetrahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(5)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), one Co(4), and two equivalent Co(6) atoms. In the second O site, O(2) is bonded to one Co(3), two equivalent Co(5), and one Sb(3) atom to form a mixture of distorted edge and corner-sharing OCo3Sb trigonal pyramids. In the third O site, O(3) is bonded to one Co(1), one Co(4), and two equivalent Co(6) atoms to form distorted corner-sharing OCo4 tetrahedra. In the fourth O site, O(4) is bonded to one Co(1), two equivalent Co(6), and one Sb(2) atom to form distorted OCo3Sb trigonal pyramids that share corners with three equivalent O(3)Co4 tetrahedra,  a cornercorner with one O(4)Co3Sb trigonal pyramid, corners with four equivalent O(7)Co3Sb trigonal pyramids, and edges with two equivalent O(7)Co3Sb trigonal pyramids. In the fifth O site, O(5) is bonded to one Co(2), two equivalent Co(5), and one Sb(1) atom to form a mixture of edge and corner-sharing OCo3Sb tetrahedra. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Co(3), two equivalent Co(6), and one Sb(1) atom. In the seventh O site, O(7) is bonded to one Co(1), one Co(4), one Co(6), and one Sb(2) atom to form distorted OCo3Sb trigonal pyramids that share corners with three equivalent O(3)Co4 tetrahedra, corners with two equivalent O(4)Co3Sb trigonal pyramids, corners with three equivalent O(7)Co3Sb trigonal pyramids,  an edgeedge with one O(4)Co3Sb trigonal pyramid, and  an edgeedge with one O(7)Co3Sb trigonal pyramid. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Co(2), one Co(5), one Sb(1), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Co(3), one Co(4), one Co(6), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Co7(SbO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.106
_cell_length_b   6.106
_cell_length_c   15.346
_cell_angle_alpha   89.796
_cell_angle_beta   89.796
_cell_angle_gamma   59.665
_symmetry_Int_Tables_number   1
_cell_volume   493.723
_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
  Co  Co0  1  0.332  0.332  0.469  1.0
  Co  Co1  1  0.993  0.993  0.141  1.0
  Co  Co2  1  0.661  0.661  0.791  1.0
  Co  Co3  1  0.339  0.339  0.209  1.0
  Co  Co4  1  0.007  0.007  0.859  1.0
  Co  Co5  1  0.668  0.668  0.531  1.0
  Co  Co6  1  0.166  0.166  0.662  1.0
  Co  Co7  1  0.834  0.834  0.338  1.0
  Co  Co8  1  0.500  0.000  0.000  1.0
  Co  Co9  1  0.166  0.666  0.662  1.0
  Co  Co10  1  0.834  0.334  0.338  1.0
  Co  Co11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.666  0.166  0.662  1.0
  Co  Co13  1  0.334  0.834  0.338  1.0
  Sb  Sb14  1  0.672  0.672  0.172  1.0
  Sb  Sb15  1  0.328  0.328  0.828  1.0
  Sb  Sb16  1  0.000  0.000  0.500  1.0
  Sb  Sb17  1  0.500  0.500  0.000  1.0
  O  O18  1  0.998  0.998  0.264  1.0
  O  O19  1  0.659  0.659  0.930  1.0
  O  O20  1  0.331  0.331  0.598  1.0
  O  O21  1  0.152  0.152  0.420  1.0
  O  O22  1  0.815  0.815  0.083  1.0
  O  O23  1  0.483  0.483  0.755  1.0
  O  O24  1  0.154  0.694  0.421  1.0
  O  O25  1  0.808  0.359  0.082  1.0
  O  O26  1  0.491  0.020  0.756  1.0
  O  O27  1  0.694  0.154  0.421  1.0
  O  O28  1  0.359  0.808  0.082  1.0
  O  O29  1  0.020  0.491  0.756  1.0
  O  O30  1  0.669  0.669  0.402  1.0
  O  O31  1  0.341  0.341  0.070  1.0
  O  O32  1  0.002  0.002  0.736  1.0
  O  O33  1  0.517  0.517  0.245  1.0
  O  O34  1  0.185  0.185  0.917  1.0
  O  O35  1  0.848  0.848  0.580  1.0
  O  O36  1  0.509  0.980  0.244  1.0
  O  O37  1  0.192  0.641  0.918  1.0
  O  O38  1  0.846  0.306  0.579  1.0
  O  O39  1  0.980  0.509  0.244  1.0
  O  O40  1  0.641  0.192  0.918  1.0
  O  O41  1  0.306  0.846  0.579  1.0
[/CIF]
.