The material described by Dy2W2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(3) atoms. In the second Dy site, Dy(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(9), two equivalent O(7), and two equivalent O(8) atoms. 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(5), and one O(6) atom to form distorted corner-sharing WO6 octahedra. In the second W site, W(2) is bonded to one O(2), one O(5), one O(7), one O(8), and one O(9) atom to form corner-sharing WO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 44-54°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Dy(1), one Dy(2), and one W(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Dy(1), one Dy(2), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to one Dy(2), two equivalent Dy(1), and one W(1) atom to form a mixture of corner and edge-sharing ODy3W trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Dy(1), one Dy(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Dy(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Dy(1) and one W(1) atom. In the seventh O site, O(7) is bonded to one Dy(1), two equivalent Dy(2), and one W(2) atom to form a mixture of distorted corner and edge-sharing ODy3W tetrahedra. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Dy(2) and one W(2) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Dy(1), one Dy(2), and one W(2) atom. is represented by the CIF file [CIF]
data_Dy2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.725
_cell_length_b   7.119
_cell_length_c   7.413
_cell_angle_alpha   70.348
_cell_angle_beta   84.800
_cell_angle_gamma   82.942
_symmetry_Int_Tables_number   1
_cell_volume   331.240
_cell_formula_units_Z   2
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  0.152  0.259  0.155  1.0
  Dy  Dy1  1  0.616  0.282  0.378  1.0
  Dy  Dy2  1  0.384  0.718  0.622  1.0
  Dy  Dy3  1  0.848  0.741  0.845  1.0
  W  W4  1  0.271  0.734  0.057  1.0
  W  W5  1  0.841  0.791  0.366  1.0
  W  W6  1  0.159  0.209  0.634  1.0
  W  W7  1  0.729  0.266  0.943  1.0
  O  O8  1  0.495  0.231  0.094  1.0
  O  O9  1  0.856  0.068  0.210  1.0
  O  O10  1  0.815  0.429  0.091  1.0
  O  O11  1  0.333  0.496  0.249  1.0
  O  O12  1  0.965  0.734  0.141  1.0
  O  O13  1  0.264  0.929  0.169  1.0
  O  O14  1  0.316  0.087  0.463  1.0
  O  O15  1  0.634  0.639  0.378  1.0
  O  O16  1  0.960  0.304  0.462  1.0
  O  O17  1  0.040  0.696  0.538  1.0
  O  O18  1  0.366  0.361  0.622  1.0
  O  O19  1  0.684  0.913  0.537  1.0
  O  O20  1  0.736  0.071  0.831  1.0
  O  O21  1  0.035  0.266  0.859  1.0
  O  O22  1  0.667  0.504  0.751  1.0
  O  O23  1  0.185  0.571  0.909  1.0
  O  O24  1  0.144  0.932  0.790  1.0
  O  O25  1  0.505  0.769  0.906  1.0
[/CIF]
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The material described by Dy2W2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(3) atoms. In the second Dy site, Dy(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(9), two equivalent O(7), and two equivalent O(8) atoms. 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(5), and one O(6) atom to form distorted corner-sharing WO6 octahedra. In the second W site, W(2) is bonded to one O(2), one O(5), one O(7), one O(8), and one O(9) atom to form corner-sharing WO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 44-54°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Dy(1), one Dy(2), and one W(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Dy(1), one Dy(2), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to one Dy(2), two equivalent Dy(1), and one W(1) atom to form a mixture of corner and edge-sharing ODy3W trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Dy(1), one Dy(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Dy(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Dy(1) and one W(1) atom. In the seventh O site, O(7) is bonded to one Dy(1), two equivalent Dy(2), and one W(2) atom to form a mixture of distorted corner and edge-sharing ODy3W tetrahedra. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Dy(2) and one W(2) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Dy(1), one Dy(2), and one W(2) atom. is represented by the CIF file [CIF]
data_Dy2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.725
_cell_length_b   7.119
_cell_length_c   7.413
_cell_angle_alpha   70.348
_cell_angle_beta   84.800
_cell_angle_gamma   82.942
_symmetry_Int_Tables_number   1
_cell_volume   331.240
_cell_formula_units_Z   2
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  0.152  0.259  0.155  1.0
  Dy  Dy1  1  0.616  0.282  0.378  1.0
  Dy  Dy2  1  0.384  0.718  0.622  1.0
  Dy  Dy3  1  0.848  0.741  0.845  1.0
  W  W4  1  0.271  0.734  0.057  1.0
  W  W5  1  0.841  0.791  0.366  1.0
  W  W6  1  0.159  0.209  0.634  1.0
  W  W7  1  0.729  0.266  0.943  1.0
  O  O8  1  0.495  0.231  0.094  1.0
  O  O9  1  0.856  0.068  0.210  1.0
  O  O10  1  0.815  0.429  0.091  1.0
  O  O11  1  0.333  0.496  0.249  1.0
  O  O12  1  0.965  0.734  0.141  1.0
  O  O13  1  0.264  0.929  0.169  1.0
  O  O14  1  0.316  0.087  0.463  1.0
  O  O15  1  0.634  0.639  0.378  1.0
  O  O16  1  0.960  0.304  0.462  1.0
  O  O17  1  0.040  0.696  0.538  1.0
  O  O18  1  0.366  0.361  0.622  1.0
  O  O19  1  0.684  0.913  0.537  1.0
  O  O20  1  0.736  0.071  0.831  1.0
  O  O21  1  0.035  0.266  0.859  1.0
  O  O22  1  0.667  0.504  0.751  1.0
  O  O23  1  0.185  0.571  0.909  1.0
  O  O24  1  0.144  0.932  0.790  1.0
  O  O25  1  0.505  0.769  0.906  1.0
[/CIF]
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