The compound described by MgCo2(SbO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted CoO6 octahedra that share corners with four equivalent Sb(3)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. In the second Co site, Co(2) is bonded to one O(1), one O(10), one O(11), one O(5), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with four equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(11), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(12), one O(6), one O(8), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-60°. In the third Sb site, Sb(3) is bonded to one O(1), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form distorted SbO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. In the fourth Sb site, Sb(4) is bonded to one O(11), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form SbO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-48°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Co(2), one Sb(2), and one Sb(3) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(3), and one Sb(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Sb(1), and one Sb(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(3), and one Sb(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(2), and one Sb(3) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Co(1), one Sb(1), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Co(2), one Sb(2), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(4) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(2), and one Sb(3) atom. is represented by the CIF file [CIF]
data_MgCo2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.995
_cell_length_b   4.882
_cell_length_c   9.566
_cell_angle_alpha   89.693
_cell_angle_beta   90.172
_cell_angle_gamma   92.103
_symmetry_Int_Tables_number   1
_cell_volume   233.145
_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  0.004  0.502  0.029  1.0
  Co  Co1  1  0.000  0.001  0.995  1.0
  Co  Co2  1  0.499  0.500  0.510  1.0
  Sb  Sb3  1  0.001  0.998  0.670  1.0
  Sb  Sb4  1  0.999  0.001  0.342  1.0
  Sb  Sb5  1  0.504  0.498  0.197  1.0
  Sb  Sb6  1  0.501  0.498  0.823  1.0
  O  O7  1  0.318  0.269  0.351  1.0
  O  O8  1  0.308  0.293  0.975  1.0
  O  O9  1  0.181  0.776  0.827  1.0
  O  O10  1  0.692  0.703  0.975  1.0
  O  O11  1  0.317  0.285  0.671  1.0
  O  O12  1  0.137  0.792  0.172  1.0
  O  O13  1  0.821  0.217  0.827  1.0
  O  O14  1  0.684  0.729  0.351  1.0
  O  O15  1  0.171  0.801  0.508  1.0
  O  O16  1  0.830  0.198  0.508  1.0
  O  O17  1  0.684  0.712  0.671  1.0
  O  O18  1  0.849  0.225  0.177  1.0
[/CIF]
.
The compound described by MgCo2(SbO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted CoO6 octahedra that share corners with four equivalent Sb(3)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Sb(1)O6 octahedra, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. In the second Co site, Co(2) is bonded to one O(1), one O(10), one O(11), one O(5), one O(8), and one O(9) atom to form CoO6 octahedra that share corners with four equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(10), one O(11), one O(3), one O(5), one O(7), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent Sb(4)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the second Sb site, Sb(2) is bonded to one O(1), one O(10), one O(12), one O(6), one O(8), and one O(9) atom to form SbO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent Sb(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-60°. In the third Sb site, Sb(3) is bonded to one O(1), one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form distorted SbO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Sb(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. In the fourth Sb site, Sb(4) is bonded to one O(11), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form SbO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-48°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Co(2), one Sb(2), and one Sb(3) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(3), and one Sb(4) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), one Sb(1), and one Sb(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(3), and one Sb(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(2), and one Sb(3) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Co(1), one Sb(1), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Co(2), one Sb(2), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Co(2), one Sb(1), and one Sb(4) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Sb(2), and one Sb(3) atom. is represented by the CIF file [CIF]
data_MgCo2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.995
_cell_length_b   4.882
_cell_length_c   9.566
_cell_angle_alpha   89.693
_cell_angle_beta   90.172
_cell_angle_gamma   92.103
_symmetry_Int_Tables_number   1
_cell_volume   233.145
_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  0.004  0.502  0.029  1.0
  Co  Co1  1  0.000  0.001  0.995  1.0
  Co  Co2  1  0.499  0.500  0.510  1.0
  Sb  Sb3  1  0.001  0.998  0.670  1.0
  Sb  Sb4  1  0.999  0.001  0.342  1.0
  Sb  Sb5  1  0.504  0.498  0.197  1.0
  Sb  Sb6  1  0.501  0.498  0.823  1.0
  O  O7  1  0.318  0.269  0.351  1.0
  O  O8  1  0.308  0.293  0.975  1.0
  O  O9  1  0.181  0.776  0.827  1.0
  O  O10  1  0.692  0.703  0.975  1.0
  O  O11  1  0.317  0.285  0.671  1.0
  O  O12  1  0.137  0.792  0.172  1.0
  O  O13  1  0.821  0.217  0.827  1.0
  O  O14  1  0.684  0.729  0.351  1.0
  O  O15  1  0.171  0.801  0.508  1.0
  O  O16  1  0.830  0.198  0.508  1.0
  O  O17  1  0.684  0.712  0.671  1.0
  O  O18  1  0.849  0.225  0.177  1.0
[/CIF]
.