The structure described by MgNi(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and  a faceface with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-58°. Ni(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form NiO6 octahedra that share corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one W(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one W(1) and one Ni(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one W(1), one W(2), and one Ni(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(2), and one Ni(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one Ni(1) atom. is represented by the CIF card [CIF]
data_MgNi(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.031
_cell_length_b   5.803
_cell_length_c   5.842
_cell_angle_alpha   71.427
_cell_angle_beta   89.034
_cell_angle_gamma   116.299
_symmetry_Int_Tables_number   1
_cell_volume   142.424
_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  0.026  0.055  0.283  1.0
  Ni  Ni1  1  0.504  0.010  0.980  1.0
  W  W2  1  0.258  0.523  0.668  1.0
  W  W3  1  0.746  0.481  0.328  1.0
  O  O4  1  0.466  0.297  0.663  1.0
  O  O5  1  0.041  0.774  0.078  1.0
  O  O6  1  0.041  0.715  0.535  1.0
  O  O7  1  0.495  0.755  0.806  1.0
  O  O8  1  0.567  0.736  0.326  1.0
  O  O9  1  0.968  0.289  0.447  1.0
  O  O10  1  0.485  0.250  0.186  1.0
  O  O11  1  0.966  0.247  0.939  1.0
[/CIF]
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The structure described by MgNi(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and  a faceface with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-58°. Ni(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form NiO6 octahedra that share corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one W(2), and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one W(1) and one Ni(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one W(1), one W(2), and one Ni(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(2), and one Ni(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one Ni(1) atom. is represented by the CIF card [CIF]
data_MgNi(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.031
_cell_length_b   5.803
_cell_length_c   5.842
_cell_angle_alpha   71.427
_cell_angle_beta   89.034
_cell_angle_gamma   116.299
_symmetry_Int_Tables_number   1
_cell_volume   142.424
_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  0.026  0.055  0.283  1.0
  Ni  Ni1  1  0.504  0.010  0.980  1.0
  W  W2  1  0.258  0.523  0.668  1.0
  W  W3  1  0.746  0.481  0.328  1.0
  O  O4  1  0.466  0.297  0.663  1.0
  O  O5  1  0.041  0.774  0.078  1.0
  O  O6  1  0.041  0.715  0.535  1.0
  O  O7  1  0.495  0.755  0.806  1.0
  O  O8  1  0.567  0.736  0.326  1.0
  O  O9  1  0.968  0.289  0.447  1.0
  O  O10  1  0.485  0.250  0.186  1.0
  O  O11  1  0.966  0.247  0.939  1.0
[/CIF]
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