The compound described by Y2W2O9 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), and one O(8) atom. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to two equivalent O(10), two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(10), two equivalent O(5), and two equivalent O(8) atoms. There are three inequivalent W sites. In the first W site, W(1) is bonded to one O(2), two equivalent O(10), and two equivalent O(11) atoms to form corner-sharing WO5 trigonal bipyramids. In the second W site, W(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 32-36°. In the third W site, W(3) is bonded to two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-42°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(3), and one W(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one W(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent W(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Y(3), and one W(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one W(2) and one W(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one W(2) and one W(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Y(1), one Y(2), and one Y(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to two equivalent W(3) atoms. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Y(3), and one W(1) atom. In the eleventh O site, O(11) is bonded in a linear geometry to two equivalent W(1) atoms. is represented by the CIF card [CIF]
data_Y2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.805
_cell_length_b   9.805
_cell_length_c   7.213
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   106.031
_symmetry_Int_Tables_number   1
_cell_volume   666.559
_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  0.120  0.409  0.498  1.0
  Y  Y1  1  0.409  0.120  0.502  1.0
  Y  Y2  1  0.771  0.229  0.250  1.0
  Y  Y3  1  0.772  0.228  0.750  1.0
  Y  Y4  1  0.228  0.772  0.250  1.0
  Y  Y5  1  0.229  0.771  0.750  1.0
  Y  Y6  1  0.591  0.880  0.002  1.0
  Y  Y7  1  0.880  0.591  0.998  1.0
  W  W8  1  0.953  0.953  0.000  1.0
  W  W9  1  0.147  0.393  0.997  1.0
  W  W10  1  0.393  0.147  0.003  1.0
  W  W11  1  0.499  0.501  0.250  1.0
  W  W12  1  0.501  0.499  0.750  1.0
  W  W13  1  0.607  0.853  0.503  1.0
  W  W14  1  0.853  0.607  0.497  1.0
  W  W15  1  0.047  0.047  0.500  1.0
  O  O16  1  0.328  0.029  0.206  1.0
  O  O17  1  0.029  0.328  0.794  1.0
  O  O18  1  0.202  0.202  0.500  1.0
  O  O19  1  0.331  0.031  0.799  1.0
  O  O20  1  0.031  0.331  0.201  1.0
  O  O21  1  0.223  0.223  0.000  1.0
  O  O22  1  0.112  0.577  0.995  1.0
  O  O23  1  0.577  0.112  0.005  1.0
  O  O24  1  0.303  0.476  0.187  1.0
  O  O25  1  0.476  0.303  0.813  1.0
  O  O26  1  0.303  0.475  0.807  1.0
  O  O27  1  0.475  0.303  0.193  1.0
  O  O28  1  0.630  0.209  0.502  1.0
  O  O29  1  0.209  0.630  0.498  1.0
  O  O30  1  0.442  0.442  0.500  1.0
  O  O31  1  0.089  0.847  0.994  1.0
  O  O32  1  0.847  0.089  0.006  1.0
  O  O33  1  0.997  0.003  0.750  1.0
  O  O34  1  0.003  0.997  0.250  1.0
  O  O35  1  0.153  0.911  0.506  1.0
  O  O36  1  0.911  0.153  0.494  1.0
  O  O37  1  0.558  0.558  0.000  1.0
  O  O38  1  0.370  0.791  0.002  1.0
  O  O39  1  0.791  0.370  0.998  1.0
  O  O40  1  0.525  0.697  0.693  1.0
  O  O41  1  0.697  0.525  0.307  1.0
  O  O42  1  0.524  0.697  0.313  1.0
  O  O43  1  0.697  0.524  0.687  1.0
  O  O44  1  0.888  0.423  0.495  1.0
  O  O45  1  0.423  0.888  0.505  1.0
  O  O46  1  0.777  0.777  0.500  1.0
  O  O47  1  0.969  0.669  0.701  1.0
  O  O48  1  0.669  0.969  0.299  1.0
  O  O49  1  0.798  0.798  0.000  1.0
  O  O50  1  0.971  0.672  0.294  1.0
  O  O51  1  0.672  0.971  0.706  1.0
[/CIF]
.
The compound described by Y2W2O9 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), and one O(8) atom. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to two equivalent O(10), two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(10), two equivalent O(5), and two equivalent O(8) atoms. There are three inequivalent W sites. In the first W site, W(1) is bonded to one O(2), two equivalent O(10), and two equivalent O(11) atoms to form corner-sharing WO5 trigonal bipyramids. In the second W site, W(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 32-36°. In the third W site, W(3) is bonded to two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-42°. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(3), and one W(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one W(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent W(2) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Y(3), and one W(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one W(2) and one W(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one W(2) and one W(3) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Y(1), one Y(2), and one Y(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to two equivalent W(3) atoms. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Y(3), and one W(1) atom. In the eleventh O site, O(11) is bonded in a linear geometry to two equivalent W(1) atoms. is represented by the CIF card [CIF]
data_Y2W2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.805
_cell_length_b   9.805
_cell_length_c   7.213
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   106.031
_symmetry_Int_Tables_number   1
_cell_volume   666.559
_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  0.120  0.409  0.498  1.0
  Y  Y1  1  0.409  0.120  0.502  1.0
  Y  Y2  1  0.771  0.229  0.250  1.0
  Y  Y3  1  0.772  0.228  0.750  1.0
  Y  Y4  1  0.228  0.772  0.250  1.0
  Y  Y5  1  0.229  0.771  0.750  1.0
  Y  Y6  1  0.591  0.880  0.002  1.0
  Y  Y7  1  0.880  0.591  0.998  1.0
  W  W8  1  0.953  0.953  0.000  1.0
  W  W9  1  0.147  0.393  0.997  1.0
  W  W10  1  0.393  0.147  0.003  1.0
  W  W11  1  0.499  0.501  0.250  1.0
  W  W12  1  0.501  0.499  0.750  1.0
  W  W13  1  0.607  0.853  0.503  1.0
  W  W14  1  0.853  0.607  0.497  1.0
  W  W15  1  0.047  0.047  0.500  1.0
  O  O16  1  0.328  0.029  0.206  1.0
  O  O17  1  0.029  0.328  0.794  1.0
  O  O18  1  0.202  0.202  0.500  1.0
  O  O19  1  0.331  0.031  0.799  1.0
  O  O20  1  0.031  0.331  0.201  1.0
  O  O21  1  0.223  0.223  0.000  1.0
  O  O22  1  0.112  0.577  0.995  1.0
  O  O23  1  0.577  0.112  0.005  1.0
  O  O24  1  0.303  0.476  0.187  1.0
  O  O25  1  0.476  0.303  0.813  1.0
  O  O26  1  0.303  0.475  0.807  1.0
  O  O27  1  0.475  0.303  0.193  1.0
  O  O28  1  0.630  0.209  0.502  1.0
  O  O29  1  0.209  0.630  0.498  1.0
  O  O30  1  0.442  0.442  0.500  1.0
  O  O31  1  0.089  0.847  0.994  1.0
  O  O32  1  0.847  0.089  0.006  1.0
  O  O33  1  0.997  0.003  0.750  1.0
  O  O34  1  0.003  0.997  0.250  1.0
  O  O35  1  0.153  0.911  0.506  1.0
  O  O36  1  0.911  0.153  0.494  1.0
  O  O37  1  0.558  0.558  0.000  1.0
  O  O38  1  0.370  0.791  0.002  1.0
  O  O39  1  0.791  0.370  0.998  1.0
  O  O40  1  0.525  0.697  0.693  1.0
  O  O41  1  0.697  0.525  0.307  1.0
  O  O42  1  0.524  0.697  0.313  1.0
  O  O43  1  0.697  0.524  0.687  1.0
  O  O44  1  0.888  0.423  0.495  1.0
  O  O45  1  0.423  0.888  0.505  1.0
  O  O46  1  0.777  0.777  0.500  1.0
  O  O47  1  0.969  0.669  0.701  1.0
  O  O48  1  0.669  0.969  0.299  1.0
  O  O49  1  0.798  0.798  0.000  1.0
  O  O50  1  0.971  0.672  0.294  1.0
  O  O51  1  0.672  0.971  0.706  1.0
[/CIF]
.