The structure described by MgCo5SbO8 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Co(3)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. 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 edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SbO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Co(1), one Co(2), one Co(3), and one Sb(1) atom to form OMgCo3Sb square pyramids that share corners with five equivalent O(1)MgCo3Sb square pyramids,  a cornercorner with one O(3)MgCo4 trigonal bipyramid, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with three equivalent O(1)MgCo3Sb square pyramids, edges with three equivalent O(3)MgCo4 trigonal bipyramids, and  an edgeedge with one O(2)Co3Sb trigonal pyramid. In the second O site, O(2) is bonded to one Co(1), two equivalent Co(2), and one Sb(1) atom to form OCo3Sb trigonal pyramids that share corners with six equivalent O(1)MgCo3Sb square pyramids, corners with three equivalent O(3)MgCo4 trigonal bipyramids, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with two equivalent O(1)MgCo3Sb square pyramids, and  an edgeedge with one O(3)MgCo4 trigonal bipyramid. In the third O site, O(3) is bonded to one Mg(1), one Co(1), one Co(3), and two equivalent Co(2) atoms to form OMgCo4 trigonal bipyramids that share corners with two equivalent O(1)MgCo3Sb square pyramids, corners with four equivalent O(3)MgCo4 trigonal bipyramids, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with six equivalent O(1)MgCo3Sb square pyramids, and  an edgeedge with one O(2)Co3Sb trigonal pyramid. is represented by the CIF card [CIF]
data_MgCo5SbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.316
_cell_length_c   6.062
_cell_angle_alpha   61.266
_cell_angle_beta   60.167
_cell_angle_gamma   64.145
_symmetry_Int_Tables_number   1
_cell_volume   171.337
_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
  Mg  Mg0  1  0.000  0.500  0.000  1.0
  Co  Co1  1  0.090  0.034  0.188  1.0
  Co  Co2  1  0.500  0.500  0.500  1.0
  Co  Co3  1  0.500  0.500  0.000  1.0
  Co  Co4  1  0.500  0.000  0.500  1.0
  Co  Co5  1  0.910  0.966  0.812  1.0
  Sb  Sb6  1  0.000  0.500  0.500  1.0
  O  O7  1  0.211  0.275  0.266  1.0
  O  O8  1  0.278  0.690  0.266  1.0
  O  O9  1  0.211  0.275  0.748  1.0
  O  O10  1  0.720  0.268  0.256  1.0
  O  O11  1  0.280  0.732  0.744  1.0
  O  O12  1  0.722  0.310  0.734  1.0
  O  O13  1  0.789  0.725  0.252  1.0
  O  O14  1  0.789  0.725  0.734  1.0
[/CIF]
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The structure described by MgCo5SbO8 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Co(3)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. 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 edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. In the third Co site, Co(3) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. Sb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form SbO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Co(1), one Co(2), one Co(3), and one Sb(1) atom to form OMgCo3Sb square pyramids that share corners with five equivalent O(1)MgCo3Sb square pyramids,  a cornercorner with one O(3)MgCo4 trigonal bipyramid, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with three equivalent O(1)MgCo3Sb square pyramids, edges with three equivalent O(3)MgCo4 trigonal bipyramids, and  an edgeedge with one O(2)Co3Sb trigonal pyramid. In the second O site, O(2) is bonded to one Co(1), two equivalent Co(2), and one Sb(1) atom to form OCo3Sb trigonal pyramids that share corners with six equivalent O(1)MgCo3Sb square pyramids, corners with three equivalent O(3)MgCo4 trigonal bipyramids, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with two equivalent O(1)MgCo3Sb square pyramids, and  an edgeedge with one O(3)MgCo4 trigonal bipyramid. In the third O site, O(3) is bonded to one Mg(1), one Co(1), one Co(3), and two equivalent Co(2) atoms to form OMgCo4 trigonal bipyramids that share corners with two equivalent O(1)MgCo3Sb square pyramids, corners with four equivalent O(3)MgCo4 trigonal bipyramids, corners with three equivalent O(2)Co3Sb trigonal pyramids, edges with six equivalent O(1)MgCo3Sb square pyramids, and  an edgeedge with one O(2)Co3Sb trigonal pyramid. is represented by the CIF card [CIF]
data_MgCo5SbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.316
_cell_length_c   6.062
_cell_angle_alpha   61.266
_cell_angle_beta   60.167
_cell_angle_gamma   64.145
_symmetry_Int_Tables_number   1
_cell_volume   171.337
_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
  Mg  Mg0  1  0.000  0.500  0.000  1.0
  Co  Co1  1  0.090  0.034  0.188  1.0
  Co  Co2  1  0.500  0.500  0.500  1.0
  Co  Co3  1  0.500  0.500  0.000  1.0
  Co  Co4  1  0.500  0.000  0.500  1.0
  Co  Co5  1  0.910  0.966  0.812  1.0
  Sb  Sb6  1  0.000  0.500  0.500  1.0
  O  O7  1  0.211  0.275  0.266  1.0
  O  O8  1  0.278  0.690  0.266  1.0
  O  O9  1  0.211  0.275  0.748  1.0
  O  O10  1  0.720  0.268  0.256  1.0
  O  O11  1  0.280  0.732  0.744  1.0
  O  O12  1  0.722  0.310  0.734  1.0
  O  O13  1  0.789  0.725  0.252  1.0
  O  O14  1  0.789  0.725  0.734  1.0
[/CIF]
.