The structure described by MgNi(TeO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted MgO6 pentagonal pyramids that share  a cornercorner with one Te(1)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Te(2)O6 octahedra, edges with two equivalent Te(4)O6 octahedra, and  a faceface with one Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. Ni(1) is bonded to one O(1), one O(11), one O(4), one O(7), one O(8), and one O(9) atom to form NiO6 octahedra that share corners with two equivalent Te(4)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids,  an edgeedge with one Te(1)O6 octahedra, and edges with two equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 60-64°. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(8) atom to form TeO6 octahedra that share corners with four equivalent Te(4)O6 octahedra,  a cornercorner with one Mg(1)O6 pentagonal pyramid,  an edgeedge with one Ni(1)O6 octahedra, and  a faceface with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 37-47°. In the second Te site, Te(2) is bonded to one O(1), one O(12), one O(4), one O(6), one O(7), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Te(4)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-47°. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom. In the fourth Te site, Te(4) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Te(2)O6 octahedra, corners with four equivalent Te(1)O6 octahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 37-64°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Ni(1), one Te(2), and one Te(3) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Te(1), and one Te(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Te(1) and one Te(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ni(1), one Te(2), and one Te(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Te(1), and one Te(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Te(2), and one Te(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Ni(1), one Te(2), and one Te(4) atom. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Mg(1), one Ni(1), one Te(1), and one Te(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Ni(1), one Te(2), and one Te(3) atom. In the tenth O site, O(10) is bonded in a T-shaped geometry to one Mg(1), one Te(1), and one Te(4) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Ni(1), one Te(1), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Te(2) and one Te(3) atom. is represented by the CIF card [CIF]
data_MgNi(TeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.789
_cell_length_b   11.413
_cell_length_c   10.132
_cell_angle_alpha   27.544
_cell_angle_beta   49.436
_cell_angle_gamma   55.064
_symmetry_Int_Tables_number   1
_cell_volume   235.162
_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  0.800  0.999  0.783  1.0
  Ni  Ni1  1  0.315  0.004  0.291  1.0
  Te  Te2  1  0.007  0.001  0.982  1.0
  Te  Te3  1  0.983  0.496  1.000  1.0
  Te  Te4  1  0.538  0.978  0.515  1.0
  Te  Te5  1  0.454  0.500  0.508  1.0
  O  O6  1  0.342  0.316  0.090  1.0
  O  O7  1  0.212  0.120  0.621  1.0
  O  O8  1  0.096  0.306  0.745  1.0
  O  O9  1  0.905  0.181  0.229  1.0
  O  O10  1  0.371  0.842  0.071  1.0
  O  O11  1  0.748  0.350  0.375  1.0
  O  O12  1  0.196  0.654  0.606  1.0
  O  O13  1  0.614  0.169  0.874  1.0
  O  O14  1  0.079  0.814  0.734  1.0
  O  O15  1  0.862  0.733  0.180  1.0
  O  O16  1  0.723  0.877  0.342  1.0
  O  O17  1  0.615  0.656  0.903  1.0
[/CIF]
.
The structure described by MgNi(TeO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted MgO6 pentagonal pyramids that share  a cornercorner with one Te(1)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Te(2)O6 octahedra, edges with two equivalent Te(4)O6 octahedra, and  a faceface with one Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. Ni(1) is bonded to one O(1), one O(11), one O(4), one O(7), one O(8), and one O(9) atom to form NiO6 octahedra that share corners with two equivalent Te(4)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids,  an edgeedge with one Te(1)O6 octahedra, and edges with two equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 60-64°. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(8) atom to form TeO6 octahedra that share corners with four equivalent Te(4)O6 octahedra,  a cornercorner with one Mg(1)O6 pentagonal pyramid,  an edgeedge with one Ni(1)O6 octahedra, and  a faceface with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 37-47°. In the second Te site, Te(2) is bonded to one O(1), one O(12), one O(4), one O(6), one O(7), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Te(4)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-47°. In the third Te site, Te(3) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom. In the fourth Te site, Te(4) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Te(2)O6 octahedra, corners with four equivalent Te(1)O6 octahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 37-64°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Ni(1), one Te(2), and one Te(3) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Te(1), and one Te(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Te(1) and one Te(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ni(1), one Te(2), and one Te(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Te(1), and one Te(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Te(2), and one Te(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Ni(1), one Te(2), and one Te(4) atom. In the eighth O site, O(8) is bonded in a distorted see-saw-like geometry to one Mg(1), one Ni(1), one Te(1), and one Te(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Ni(1), one Te(2), and one Te(3) atom. In the tenth O site, O(10) is bonded in a T-shaped geometry to one Mg(1), one Te(1), and one Te(4) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Ni(1), one Te(1), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Te(2) and one Te(3) atom. is represented by the CIF card [CIF]
data_MgNi(TeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.789
_cell_length_b   11.413
_cell_length_c   10.132
_cell_angle_alpha   27.544
_cell_angle_beta   49.436
_cell_angle_gamma   55.064
_symmetry_Int_Tables_number   1
_cell_volume   235.162
_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  0.800  0.999  0.783  1.0
  Ni  Ni1  1  0.315  0.004  0.291  1.0
  Te  Te2  1  0.007  0.001  0.982  1.0
  Te  Te3  1  0.983  0.496  1.000  1.0
  Te  Te4  1  0.538  0.978  0.515  1.0
  Te  Te5  1  0.454  0.500  0.508  1.0
  O  O6  1  0.342  0.316  0.090  1.0
  O  O7  1  0.212  0.120  0.621  1.0
  O  O8  1  0.096  0.306  0.745  1.0
  O  O9  1  0.905  0.181  0.229  1.0
  O  O10  1  0.371  0.842  0.071  1.0
  O  O11  1  0.748  0.350  0.375  1.0
  O  O12  1  0.196  0.654  0.606  1.0
  O  O13  1  0.614  0.169  0.874  1.0
  O  O14  1  0.079  0.814  0.734  1.0
  O  O15  1  0.862  0.733  0.180  1.0
  O  O16  1  0.723  0.877  0.342  1.0
  O  O17  1  0.615  0.656  0.903  1.0
[/CIF]
.