The compound described by Y2W2O9 crystallizes in the orthorhombic Pbcn space group. Y(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(4), and four equivalent O(2) atoms. W(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 27-38°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Y(1) and two equivalent W(1) atoms. In the second O site, O(2) is bonded to four equivalent Y(1) atoms to form a mixture of corner and edge-sharing OY4 tetrahedra. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one W(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Y2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.378
_cell_length_b   5.494
_cell_length_c   23.765
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   702.160
_cell_formula_units_Z   4
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
  Y  Y0  1  0.277  0.888  0.297  1.0
  Y  Y1  1  0.777  0.888  0.203  1.0
  Y  Y2  1  0.277  0.612  0.703  1.0
  Y  Y3  1  0.777  0.612  0.797  1.0
  Y  Y4  1  0.723  0.388  0.297  1.0
  Y  Y5  1  0.223  0.388  0.203  1.0
  Y  Y6  1  0.723  0.112  0.703  1.0
  Y  Y7  1  0.223  0.112  0.797  1.0
  W  W8  1  0.751  0.822  0.422  1.0
  W  W9  1  0.251  0.822  0.078  1.0
  W  W10  1  0.751  0.678  0.578  1.0
  W  W11  1  0.251  0.678  0.922  1.0
  W  W12  1  0.249  0.322  0.422  1.0
  W  W13  1  0.749  0.322  0.078  1.0
  W  W14  1  0.249  0.178  0.578  1.0
  W  W15  1  0.749  0.178  0.922  1.0
  O  O16  1  0.540  0.987  0.098  1.0
  O  O17  1  0.460  0.013  0.902  1.0
  O  O18  1  0.006  0.873  0.741  1.0
  O  O19  1  0.450  0.929  0.561  1.0
  O  O20  1  0.506  0.873  0.759  1.0
  O  O21  1  0.950  0.929  0.939  1.0
  O  O22  1  0.634  0.777  0.348  1.0
  O  O23  1  0.134  0.777  0.152  1.0
  O  O24  1  0.339  0.750  0.000  1.0
  O  O25  1  0.839  0.750  0.500  1.0
  O  O26  1  0.634  0.723  0.652  1.0
  O  O27  1  0.134  0.723  0.848  1.0
  O  O28  1  0.450  0.571  0.439  1.0
  O  O29  1  0.006  0.627  0.259  1.0
  O  O30  1  0.950  0.571  0.061  1.0
  O  O31  1  0.506  0.627  0.241  1.0
  O  O32  1  0.960  0.487  0.402  1.0
  O  O33  1  0.040  0.513  0.598  1.0
  O  O34  1  0.460  0.487  0.098  1.0
  O  O35  1  0.540  0.513  0.902  1.0
  O  O36  1  0.994  0.373  0.741  1.0
  O  O37  1  0.550  0.429  0.561  1.0
  O  O38  1  0.494  0.373  0.759  1.0
  O  O39  1  0.050  0.429  0.939  1.0
  O  O40  1  0.366  0.277  0.348  1.0
  O  O41  1  0.866  0.277  0.152  1.0
  O  O42  1  0.661  0.250  0.000  1.0
  O  O43  1  0.161  0.250  0.500  1.0
  O  O44  1  0.366  0.223  0.652  1.0
  O  O45  1  0.866  0.223  0.848  1.0
  O  O46  1  0.550  0.071  0.439  1.0
  O  O47  1  0.994  0.127  0.259  1.0
  O  O48  1  0.050  0.071  0.061  1.0
  O  O49  1  0.494  0.127  0.241  1.0
  O  O50  1  0.040  0.987  0.402  1.0
  O  O51  1  0.960  0.013  0.598  1.0
[/CIF]
.
The compound described by Y2W2O9 crystallizes in the orthorhombic Pbcn space group. Y(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(4), and four equivalent O(2) atoms. W(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 27-38°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Y(1) and two equivalent W(1) atoms. In the second O site, O(2) is bonded to four equivalent Y(1) atoms to form a mixture of corner and edge-sharing OY4 tetrahedra. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one W(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Y2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.378
_cell_length_b   5.494
_cell_length_c   23.765
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   702.160
_cell_formula_units_Z   4
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
  Y  Y0  1  0.277  0.888  0.297  1.0
  Y  Y1  1  0.777  0.888  0.203  1.0
  Y  Y2  1  0.277  0.612  0.703  1.0
  Y  Y3  1  0.777  0.612  0.797  1.0
  Y  Y4  1  0.723  0.388  0.297  1.0
  Y  Y5  1  0.223  0.388  0.203  1.0
  Y  Y6  1  0.723  0.112  0.703  1.0
  Y  Y7  1  0.223  0.112  0.797  1.0
  W  W8  1  0.751  0.822  0.422  1.0
  W  W9  1  0.251  0.822  0.078  1.0
  W  W10  1  0.751  0.678  0.578  1.0
  W  W11  1  0.251  0.678  0.922  1.0
  W  W12  1  0.249  0.322  0.422  1.0
  W  W13  1  0.749  0.322  0.078  1.0
  W  W14  1  0.249  0.178  0.578  1.0
  W  W15  1  0.749  0.178  0.922  1.0
  O  O16  1  0.540  0.987  0.098  1.0
  O  O17  1  0.460  0.013  0.902  1.0
  O  O18  1  0.006  0.873  0.741  1.0
  O  O19  1  0.450  0.929  0.561  1.0
  O  O20  1  0.506  0.873  0.759  1.0
  O  O21  1  0.950  0.929  0.939  1.0
  O  O22  1  0.634  0.777  0.348  1.0
  O  O23  1  0.134  0.777  0.152  1.0
  O  O24  1  0.339  0.750  0.000  1.0
  O  O25  1  0.839  0.750  0.500  1.0
  O  O26  1  0.634  0.723  0.652  1.0
  O  O27  1  0.134  0.723  0.848  1.0
  O  O28  1  0.450  0.571  0.439  1.0
  O  O29  1  0.006  0.627  0.259  1.0
  O  O30  1  0.950  0.571  0.061  1.0
  O  O31  1  0.506  0.627  0.241  1.0
  O  O32  1  0.960  0.487  0.402  1.0
  O  O33  1  0.040  0.513  0.598  1.0
  O  O34  1  0.460  0.487  0.098  1.0
  O  O35  1  0.540  0.513  0.902  1.0
  O  O36  1  0.994  0.373  0.741  1.0
  O  O37  1  0.550  0.429  0.561  1.0
  O  O38  1  0.494  0.373  0.759  1.0
  O  O39  1  0.050  0.429  0.939  1.0
  O  O40  1  0.366  0.277  0.348  1.0
  O  O41  1  0.866  0.277  0.152  1.0
  O  O42  1  0.661  0.250  0.000  1.0
  O  O43  1  0.161  0.250  0.500  1.0
  O  O44  1  0.366  0.223  0.652  1.0
  O  O45  1  0.866  0.223  0.848  1.0
  O  O46  1  0.550  0.071  0.439  1.0
  O  O47  1  0.994  0.127  0.259  1.0
  O  O48  1  0.050  0.071  0.061  1.0
  O  O49  1  0.494  0.127  0.241  1.0
  O  O50  1  0.040  0.987  0.402  1.0
  O  O51  1  0.960  0.013  0.598  1.0
[/CIF]
.