The compound described by MgNi2(WO4)2 crystallizes in the monoclinic P2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, edges with two equivalent W(2)O6 octahedra, and faces with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, corners with four equivalent Ni(2)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the second W site, W(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, corners with four equivalent Ni(2)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(1), one Ni(1), and one Ni(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(2), one Ni(1), and one Ni(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(1), one W(2), and one Ni(2) atom. is represented by the CIF card [CIF]
data_MgNi2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.859
_cell_length_b   5.143
_cell_length_c   5.921
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.711
_symmetry_Int_Tables_number   1
_cell_volume   147.879
_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  0.000  0.750  0.386  1.0
  Ni  Ni1  1  0.500  0.250  0.640  1.0
  Ni  Ni2  1  0.500  0.750  0.353  1.0
  W  W3  1  0.000  0.250  0.150  1.0
  W  W4  1  1.000  0.750  0.851  1.0
  O  O5  1  0.750  0.076  0.364  1.0
  O  O6  1  0.250  0.424  0.364  1.0
  O  O7  1  0.256  0.903  0.619  1.0
  O  O8  1  0.744  0.597  0.619  1.0
  O  O9  1  0.785  0.067  0.888  1.0
  O  O10  1  0.215  0.433  0.888  1.0
  O  O11  1  0.781  0.580  0.126  1.0
  O  O12  1  0.219  0.920  0.126  1.0
[/CIF]
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The compound described by MgNi2(WO4)2 crystallizes in the monoclinic P2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, edges with two equivalent W(2)O6 octahedra, and faces with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, corners with four equivalent Ni(2)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the second W site, W(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra, corners with four equivalent Ni(2)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, and faces with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-50°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(1), one Ni(1), and one Ni(2) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(2), one Ni(1), and one Ni(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one W(1), one W(2), and one Ni(2) atom. is represented by the CIF card [CIF]
data_MgNi2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.859
_cell_length_b   5.143
_cell_length_c   5.921
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   91.711
_symmetry_Int_Tables_number   1
_cell_volume   147.879
_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  0.000  0.750  0.386  1.0
  Ni  Ni1  1  0.500  0.250  0.640  1.0
  Ni  Ni2  1  0.500  0.750  0.353  1.0
  W  W3  1  0.000  0.250  0.150  1.0
  W  W4  1  1.000  0.750  0.851  1.0
  O  O5  1  0.750  0.076  0.364  1.0
  O  O6  1  0.250  0.424  0.364  1.0
  O  O7  1  0.256  0.903  0.619  1.0
  O  O8  1  0.744  0.597  0.619  1.0
  O  O9  1  0.785  0.067  0.888  1.0
  O  O10  1  0.215  0.433  0.888  1.0
  O  O11  1  0.781  0.580  0.126  1.0
  O  O12  1  0.219  0.920  0.126  1.0
[/CIF]
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