The structure described by MgDyCu(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), 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 Dy(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, edges with two equivalent W(2)O6 octahedra, and  a faceface with one Dy(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-61°. Dy(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form DyO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-61°. 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 four equivalent Dy(1)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 34-56°. In the second W site, W(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Dy(1)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 27-54°. Cu(1) is bonded in a 2-coordinate geometry to one O(3), one O(5), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Dy(1), and one W(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one Dy(1), and one W(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one W(1), one W(2), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Dy(1), one W(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Dy(1), one W(2), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Dy(1), and one W(2) atom. In the seventh O site, O(7) is bonded to one Mg(1), one W(1), one W(2), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OMgCuW2 trigonal pyramids. In the eighth O site, O(8) is bonded to one Mg(1), one Dy(1), one W(1), and one W(2) atom to form a mixture of edge and corner-sharing ODyMgW2 trigonal pyramids. is represented by the CIF file [CIF]
data_DyMgCu(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.364
_cell_length_b   6.181
_cell_length_c   6.101
_cell_angle_alpha   106.835
_cell_angle_beta   115.553
_cell_angle_gamma   91.959
_symmetry_Int_Tables_number   1
_cell_volume   171.659
_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
  Dy  Dy0  1  0.663  0.719  0.135  1.0
  Mg  Mg1  1  0.370  0.571  0.528  1.0
  Cu  Cu2  1  0.091  0.156  0.054  1.0
  W  W3  1  0.896  0.359  0.596  1.0
  W  W4  1  0.390  0.062  0.603  1.0
  O  O5  1  0.190  0.602  0.818  1.0
  O  O6  1  0.634  0.509  0.368  1.0
  O  O7  1  0.155  0.148  0.778  1.0
  O  O8  1  0.606  0.047  0.399  1.0
  O  O9  1  0.595  0.895  0.825  1.0
  O  O10  1  0.133  0.772  0.346  1.0
  O  O11  1  0.104  0.249  0.379  1.0
  O  O12  1  0.645  0.403  0.781  1.0
[/CIF]
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The structure described by MgDyCu(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), 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 Dy(1)O6 octahedra, edges with two equivalent W(1)O6 octahedra, edges with two equivalent W(2)O6 octahedra, and  a faceface with one Dy(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-61°. Dy(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form DyO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent W(1)O6 octahedra, corners with four equivalent W(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-61°. 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 four equivalent Dy(1)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 34-56°. In the second W site, W(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Dy(1)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 27-54°. Cu(1) is bonded in a 2-coordinate geometry to one O(3), one O(5), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Dy(1), and one W(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one Dy(1), and one W(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one W(1), one W(2), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Dy(1), one W(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Dy(1), one W(2), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one Dy(1), and one W(2) atom. In the seventh O site, O(7) is bonded to one Mg(1), one W(1), one W(2), and one Cu(1) atom to form a mixture of distorted edge and corner-sharing OMgCuW2 trigonal pyramids. In the eighth O site, O(8) is bonded to one Mg(1), one Dy(1), one W(1), and one W(2) atom to form a mixture of edge and corner-sharing ODyMgW2 trigonal pyramids. is represented by the CIF file [CIF]
data_DyMgCu(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.364
_cell_length_b   6.181
_cell_length_c   6.101
_cell_angle_alpha   106.835
_cell_angle_beta   115.553
_cell_angle_gamma   91.959
_symmetry_Int_Tables_number   1
_cell_volume   171.659
_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
  Dy  Dy0  1  0.663  0.719  0.135  1.0
  Mg  Mg1  1  0.370  0.571  0.528  1.0
  Cu  Cu2  1  0.091  0.156  0.054  1.0
  W  W3  1  0.896  0.359  0.596  1.0
  W  W4  1  0.390  0.062  0.603  1.0
  O  O5  1  0.190  0.602  0.818  1.0
  O  O6  1  0.634  0.509  0.368  1.0
  O  O7  1  0.155  0.148  0.778  1.0
  O  O8  1  0.606  0.047  0.399  1.0
  O  O9  1  0.595  0.895  0.825  1.0
  O  O10  1  0.133  0.772  0.346  1.0
  O  O11  1  0.104  0.249  0.379  1.0
  O  O12  1  0.645  0.403  0.781  1.0
[/CIF]
.