The compound described by MgNi2(SbO3)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(3), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, and  an edgeedge with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(8), two equivalent O(4), and two equivalent O(5) atoms to form distorted NiO5 trigonal bipyramids that share corners with three equivalent Sb(1)O6 octahedra and corners with three equivalent Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. In the second Ni site, Ni(2) is bonded to one O(1), one O(2), one O(3), one O(9), and two equivalent O(7) atoms to form distorted NiO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(6), one O(8), and two equivalent O(5) atoms to form SbO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Ni(1)O5 trigonal bipyramids,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one O(9) and two equivalent O(4) atoms. In the third Sb site, Sb(3) is bonded to one O(3), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form SbO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Ni(1)O5 trigonal bipyramids,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. In the fourth Sb site, Sb(4) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(5), and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Ni(2), and one Sb(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ni(2), one Sb(1), and one Sb(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Ni(2), and one Sb(3) atom. In the fourth O site, O(4) is bonded in a 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 trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Sb(1) and one Sb(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Ni(2), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Ni(2), one Sb(2), and one Sb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgNi2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.242
_cell_length_b   5.242
_cell_length_c   9.445
_cell_angle_alpha   91.632
_cell_angle_beta   91.634
_cell_angle_gamma   78.505
_symmetry_Int_Tables_number   1
_cell_volume   254.166
_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  0.785  0.784  0.503  1.0
  Ni  Ni1  1  0.934  0.934  0.993  1.0
  Ni  Ni2  1  0.460  0.460  0.506  1.0
  Sb  Sb3  1  0.509  0.508  0.833  1.0
  Sb  Sb4  1  0.083  0.083  0.303  1.0
  Sb  Sb5  1  0.514  0.513  0.160  1.0
  Sb  Sb6  1  0.065  0.065  0.683  1.0
  O  O7  1  0.645  0.644  0.669  1.0
  O  O8  1  0.305  0.304  0.681  1.0
  O  O9  1  0.647  0.646  0.338  1.0
  O  O10  1  0.209  0.816  0.148  1.0
  O  O11  1  0.817  0.208  0.149  1.0
  O  O12  1  0.811  0.193  0.835  1.0
  O  O13  1  0.356  0.355  0.991  1.0
  O  O14  1  0.164  0.782  0.536  1.0
  O  O15  1  0.783  0.163  0.536  1.0
  O  O16  1  0.681  0.681  0.997  1.0
  O  O17  1  0.331  0.330  0.303  1.0
  O  O18  1  0.193  0.810  0.835  1.0
[/CIF]
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The compound described by MgNi2(SbO3)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1), one O(3), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Sb(3)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, and  an edgeedge with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(8), two equivalent O(4), and two equivalent O(5) atoms to form distorted NiO5 trigonal bipyramids that share corners with three equivalent Sb(1)O6 octahedra and corners with three equivalent Sb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. In the second Ni site, Ni(2) is bonded to one O(1), one O(2), one O(3), one O(9), and two equivalent O(7) atoms to form distorted NiO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra,  an edgeedge with one Sb(3)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are four inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(1), one O(2), one O(6), one O(8), and two equivalent O(5) atoms to form SbO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Ni(1)O5 trigonal bipyramids,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one Sb(3)O6 octahedra. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one O(9) and two equivalent O(4) atoms. In the third Sb site, Sb(3) is bonded to one O(3), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form SbO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with three equivalent Ni(1)O5 trigonal bipyramids,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one Sb(1)O6 octahedra. In the fourth Sb site, Sb(4) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(5), and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Ni(2), and one Sb(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Ni(2), one Sb(1), and one Sb(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Ni(2), and one Sb(3) atom. In the fourth O site, O(4) is bonded in a 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 trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(4) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Sb(1) and one Sb(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Ni(2), and one Sb(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ni(1), one Sb(1), and one Sb(3) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Ni(2), one Sb(2), and one Sb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgNi2(SbO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.242
_cell_length_b   5.242
_cell_length_c   9.445
_cell_angle_alpha   91.632
_cell_angle_beta   91.634
_cell_angle_gamma   78.505
_symmetry_Int_Tables_number   1
_cell_volume   254.166
_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  0.785  0.784  0.503  1.0
  Ni  Ni1  1  0.934  0.934  0.993  1.0
  Ni  Ni2  1  0.460  0.460  0.506  1.0
  Sb  Sb3  1  0.509  0.508  0.833  1.0
  Sb  Sb4  1  0.083  0.083  0.303  1.0
  Sb  Sb5  1  0.514  0.513  0.160  1.0
  Sb  Sb6  1  0.065  0.065  0.683  1.0
  O  O7  1  0.645  0.644  0.669  1.0
  O  O8  1  0.305  0.304  0.681  1.0
  O  O9  1  0.647  0.646  0.338  1.0
  O  O10  1  0.209  0.816  0.148  1.0
  O  O11  1  0.817  0.208  0.149  1.0
  O  O12  1  0.811  0.193  0.835  1.0
  O  O13  1  0.356  0.355  0.991  1.0
  O  O14  1  0.164  0.782  0.536  1.0
  O  O15  1  0.783  0.163  0.536  1.0
  O  O16  1  0.681  0.681  0.997  1.0
  O  O17  1  0.331  0.330  0.303  1.0
  O  O18  1  0.193  0.810  0.835  1.0
[/CIF]
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