The structure described by MgCr2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form distorted MgO4 tetrahedra that share  a cornercorner with one W(2)O6 octahedra, corners with three equivalent W(1)O6 octahedra, and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-58°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form WO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cr(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 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 distorted trigonal planar geometry to one W(1), one W(2), and one Cr(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(2), one Cr(1), and one Cr(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one W(2), one Cr(1), and one Cr(2) atom to form distorted face-sharing OMgCr2W trigonal pyramids. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one Cr(1), and one Cr(2) atom. In the eighth O site, O(8) is bonded to one Mg(1), one W(1), one Cr(1), and one Cr(2) atom to form distorted face-sharing OMgCr2W trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   6.048
_cell_length_c   6.140
_cell_angle_alpha   61.705
_cell_angle_beta   78.855
_cell_angle_gamma   79.478
_symmetry_Int_Tables_number   1
_cell_volume   167.594
_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  0.718  0.098  0.592  1.0
  Cr  Cr1  1  0.432  0.220  0.214  1.0
  Cr  Cr2  1  0.433  0.705  0.728  1.0
  W  W3  1  0.017  0.754  0.246  1.0
  W  W4  1  0.028  0.279  0.768  1.0
  O  O5  1  0.185  0.609  0.594  1.0
  O  O6  1  0.853  0.421  0.436  1.0
  O  O7  1  0.869  0.946  0.901  1.0
  O  O8  1  0.183  0.087  0.115  1.0
  O  O9  1  0.666  0.393  0.900  1.0
  O  O10  1  0.330  0.102  0.602  1.0
  O  O11  1  0.280  0.577  0.080  1.0
  O  O12  1  0.686  0.905  0.407  1.0
[/CIF]
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The structure described by MgCr2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(6), and one O(8) atom to form distorted MgO4 tetrahedra that share  a cornercorner with one W(2)O6 octahedra, corners with three equivalent W(1)O6 octahedra, and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-58°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form WO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 5-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cr(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 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 distorted trigonal planar geometry to one W(1), one W(2), and one Cr(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(2), one Cr(1), and one Cr(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one W(2), one Cr(1), and one Cr(2) atom to form distorted face-sharing OMgCr2W trigonal pyramids. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one Cr(1), and one Cr(2) atom. In the eighth O site, O(8) is bonded to one Mg(1), one W(1), one Cr(1), and one Cr(2) atom to form distorted face-sharing OMgCr2W trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCr2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.254
_cell_length_b   6.048
_cell_length_c   6.140
_cell_angle_alpha   61.705
_cell_angle_beta   78.855
_cell_angle_gamma   79.478
_symmetry_Int_Tables_number   1
_cell_volume   167.594
_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  0.718  0.098  0.592  1.0
  Cr  Cr1  1  0.432  0.220  0.214  1.0
  Cr  Cr2  1  0.433  0.705  0.728  1.0
  W  W3  1  0.017  0.754  0.246  1.0
  W  W4  1  0.028  0.279  0.768  1.0
  O  O5  1  0.185  0.609  0.594  1.0
  O  O6  1  0.853  0.421  0.436  1.0
  O  O7  1  0.869  0.946  0.901  1.0
  O  O8  1  0.183  0.087  0.115  1.0
  O  O9  1  0.666  0.393  0.900  1.0
  O  O10  1  0.330  0.102  0.602  1.0
  O  O11  1  0.280  0.577  0.080  1.0
  O  O12  1  0.686  0.905  0.407  1.0
[/CIF]
.