The structure described by MgW2Cu2(O3F2)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(6), two equivalent O(3), and one F(1) atom to form distorted MgO4F trigonal bipyramids that share corners with two equivalent Mg(1)O4F trigonal bipyramids,  an edgeedge with one W(2)O4F2 octahedra, and edges with two equivalent W(1)O4F2 octahedra. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), two equivalent O(4), one F(2), and one F(3) atom to form WO4F2 octahedra that share corners with two equivalent W(1)O4F2 octahedra and edges with two equivalent Mg(1)O4F trigonal bipyramids. The corner-sharing octahedral tilt angles are 17°. In the second W site, W(2) is bonded to one O(1), one O(6), two equivalent O(5), one F(1), and one F(4) atom to form WO4F2 octahedra that share corners with two equivalent W(2)O4F2 octahedra and  an edgeedge with one Mg(1)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles are 14°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent F(4) atoms. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(3) and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(2) and one Cu(1) atom. In the second O site, O(2) is bonded in a linear geometry to one W(1) and one Cu(1) atom. In the third O site, O(3) is bonded to two equivalent Mg(1), one W(1), and one Cu(2) atom to form distorted corner-sharing OMg2CuW trigonal pyramids. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1) and two equivalent W(1) atoms. In the fifth O site, O(5) is bonded in a linear geometry to two equivalent W(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(2), and one Cu(2) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted water-like geometry to one Mg(1) and one W(2) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one W(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to one W(1) atom. In the fourth F site, F(4) is bonded in a distorted trigonal planar geometry to one W(2) and two equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_MgCu2W2(O3F2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.866
_cell_length_b   5.707
_cell_length_c   10.345
_cell_angle_alpha   91.242
_cell_angle_beta   90.022
_cell_angle_gamma   109.720
_symmetry_Int_Tables_number   1
_cell_volume   214.812
_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  0.691  0.889  0.028  1.0
  Cu  Cu1  1  0.014  0.533  0.512  1.0
  Cu  Cu2  1  0.986  0.477  0.007  1.0
  W  W3  1  0.236  0.978  0.259  1.0
  W  W4  1  0.766  0.040  0.741  1.0
  O  O5  1  0.898  0.305  0.641  1.0
  O  O6  1  0.112  0.729  0.370  1.0
  O  O7  1  0.144  0.795  0.090  1.0
  O  O8  1  0.743  0.993  0.232  1.0
  O  O9  1  0.244  0.997  0.743  1.0
  O  O10  1  0.837  0.182  0.912  1.0
  F  F11  1  0.604  0.714  0.861  1.0
  F  F12  1  0.389  0.286  0.147  1.0
  F  F13  1  0.361  0.230  0.395  1.0
  F  F14  1  0.635  0.778  0.604  1.0
[/CIF]
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The structure described by MgW2Cu2(O3F2)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(6), two equivalent O(3), and one F(1) atom to form distorted MgO4F trigonal bipyramids that share corners with two equivalent Mg(1)O4F trigonal bipyramids,  an edgeedge with one W(2)O4F2 octahedra, and edges with two equivalent W(1)O4F2 octahedra. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), two equivalent O(4), one F(2), and one F(3) atom to form WO4F2 octahedra that share corners with two equivalent W(1)O4F2 octahedra and edges with two equivalent Mg(1)O4F trigonal bipyramids. The corner-sharing octahedral tilt angles are 17°. In the second W site, W(2) is bonded to one O(1), one O(6), two equivalent O(5), one F(1), and one F(4) atom to form WO4F2 octahedra that share corners with two equivalent W(2)O4F2 octahedra and  an edgeedge with one Mg(1)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles are 14°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent F(4) atoms. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(3) and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(2) and one Cu(1) atom. In the second O site, O(2) is bonded in a linear geometry to one W(1) and one Cu(1) atom. In the third O site, O(3) is bonded to two equivalent Mg(1), one W(1), and one Cu(2) atom to form distorted corner-sharing OMg2CuW trigonal pyramids. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1) and two equivalent W(1) atoms. In the fifth O site, O(5) is bonded in a linear geometry to two equivalent W(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(2), and one Cu(2) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted water-like geometry to one Mg(1) and one W(2) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one W(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to one W(1) atom. In the fourth F site, F(4) is bonded in a distorted trigonal planar geometry to one W(2) and two equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_MgCu2W2(O3F2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.866
_cell_length_b   5.707
_cell_length_c   10.345
_cell_angle_alpha   91.242
_cell_angle_beta   90.022
_cell_angle_gamma   109.720
_symmetry_Int_Tables_number   1
_cell_volume   214.812
_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  0.691  0.889  0.028  1.0
  Cu  Cu1  1  0.014  0.533  0.512  1.0
  Cu  Cu2  1  0.986  0.477  0.007  1.0
  W  W3  1  0.236  0.978  0.259  1.0
  W  W4  1  0.766  0.040  0.741  1.0
  O  O5  1  0.898  0.305  0.641  1.0
  O  O6  1  0.112  0.729  0.370  1.0
  O  O7  1  0.144  0.795  0.090  1.0
  O  O8  1  0.743  0.993  0.232  1.0
  O  O9  1  0.244  0.997  0.743  1.0
  O  O10  1  0.837  0.182  0.912  1.0
  F  F11  1  0.604  0.714  0.861  1.0
  F  F12  1  0.389  0.286  0.147  1.0
  F  F13  1  0.361  0.230  0.395  1.0
  F  F14  1  0.635  0.778  0.604  1.0
[/CIF]
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