The structure described by MgNi2(SbO3)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 4-coordinate geometry to one O(3), one O(7), and two equivalent O(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form distorted NiO5 trigonal bipyramids that share  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(1)O5 trigonal bipyramids, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(9), two equivalent O(1), and two equivalent O(6) atoms to form distorted SbO5 trigonal bipyramids that share corners with three equivalent Sb(4)O6 octahedra and corners with two equivalent Ni(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 38-53°. In the second Sb site, Sb(2) is bonded to one O(3), one O(4), one O(7), one O(8), and two equivalent O(2) atoms to form SbO6 octahedra that share  an edgeedge with one Sb(4)O6 octahedra and  an edgeedge with one Ni(1)O5 trigonal bipyramid. In the third Sb site, Sb(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(6) atoms. In the fourth Sb site, Sb(4) is bonded to one O(5), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form SbO6 octahedra that share  a cornercorner with one Ni(1)O5 trigonal bipyramid, corners with three equivalent Sb(1)O5 trigonal bipyramids, and  an edgeedge with one Sb(2)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ni(2), one Sb(1), and one Sb(4) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ni(2), one Sb(2), and one Sb(3) atom. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1), one Ni(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ni(1), one Sb(2), and one Sb(3) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Ni(1) and one Sb(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(3) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Sb(2), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ni(2), one Sb(2), and one Sb(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Sb(1) and one Sb(4) atom. is represented by the CIF card [CIF]
data_MgNi2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.331
_cell_length_c   9.494
_cell_angle_alpha   85.702
_cell_angle_beta   94.298
_cell_angle_gamma   103.178
_symmetry_Int_Tables_number   1
_cell_volume   261.533
_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  0.293  0.707  0.354  1.0
  Ni  Ni1  1  0.989  0.011  0.006  1.0
  Ni  Ni2  1  0.581  0.419  0.514  1.0
  Sb  Sb3  1  0.449  0.551  0.815  1.0
  Sb  Sb4  1  0.952  0.048  0.340  1.0
  Sb  Sb5  1  0.563  0.437  0.143  1.0
  Sb  Sb6  1  0.011  0.989  0.673  1.0
  O  O7  1  0.707  0.672  0.668  1.0
  O  O8  1  0.328  0.293  0.668  1.0
  O  O9  1  0.664  0.736  0.357  1.0
  O  O10  1  0.119  0.881  0.203  1.0
  O  O11  1  0.806  0.194  0.158  1.0
  O  O12  1  0.868  0.132  0.817  1.0
  O  O13  1  0.327  0.290  0.974  1.0
  O  O14  1  0.138  0.862  0.503  1.0
  O  O15  1  0.820  0.180  0.509  1.0
  O  O16  1  0.710  0.673  0.974  1.0
  O  O17  1  0.264  0.336  0.357  1.0
  O  O18  1  0.217  0.783  0.811  1.0
[/CIF]
.
The structure described by MgNi2(SbO3)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 4-coordinate geometry to one O(3), one O(7), and two equivalent O(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form distorted NiO5 trigonal bipyramids that share  a cornercorner with one Sb(4)O6 octahedra, corners with two equivalent Sb(1)O5 trigonal bipyramids, and  an edgeedge with one Sb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(1), and two equivalent O(2) atoms. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(9), two equivalent O(1), and two equivalent O(6) atoms to form distorted SbO5 trigonal bipyramids that share corners with three equivalent Sb(4)O6 octahedra and corners with two equivalent Ni(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 38-53°. In the second Sb site, Sb(2) is bonded to one O(3), one O(4), one O(7), one O(8), and two equivalent O(2) atoms to form SbO6 octahedra that share  an edgeedge with one Sb(4)O6 octahedra and  an edgeedge with one Ni(1)O5 trigonal bipyramid. In the third Sb site, Sb(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(6) atoms. In the fourth Sb site, Sb(4) is bonded to one O(5), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form SbO6 octahedra that share  a cornercorner with one Ni(1)O5 trigonal bipyramid, corners with three equivalent Sb(1)O5 trigonal bipyramids, and  an edgeedge with one Sb(2)O6 octahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ni(2), one Sb(1), and one Sb(4) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ni(2), one Sb(2), and one Sb(3) atom. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1), one Ni(1), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ni(1), one Sb(2), and one Sb(3) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Ni(1) and one Sb(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(3) atom. In the seventh O site, O(7) is bonded in a T-shaped geometry to one Mg(1), one Sb(2), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ni(2), one Sb(2), and one Sb(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Sb(1) and one Sb(4) atom. is represented by the CIF card [CIF]
data_MgNi2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.331
_cell_length_c   9.494
_cell_angle_alpha   85.702
_cell_angle_beta   94.298
_cell_angle_gamma   103.178
_symmetry_Int_Tables_number   1
_cell_volume   261.533
_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  0.293  0.707  0.354  1.0
  Ni  Ni1  1  0.989  0.011  0.006  1.0
  Ni  Ni2  1  0.581  0.419  0.514  1.0
  Sb  Sb3  1  0.449  0.551  0.815  1.0
  Sb  Sb4  1  0.952  0.048  0.340  1.0
  Sb  Sb5  1  0.563  0.437  0.143  1.0
  Sb  Sb6  1  0.011  0.989  0.673  1.0
  O  O7  1  0.707  0.672  0.668  1.0
  O  O8  1  0.328  0.293  0.668  1.0
  O  O9  1  0.664  0.736  0.357  1.0
  O  O10  1  0.119  0.881  0.203  1.0
  O  O11  1  0.806  0.194  0.158  1.0
  O  O12  1  0.868  0.132  0.817  1.0
  O  O13  1  0.327  0.290  0.974  1.0
  O  O14  1  0.138  0.862  0.503  1.0
  O  O15  1  0.820  0.180  0.509  1.0
  O  O16  1  0.710  0.673  0.974  1.0
  O  O17  1  0.264  0.336  0.357  1.0
  O  O18  1  0.217  0.783  0.811  1.0
[/CIF]
.