The crystal structure described by Y2W2O7 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1), two equivalent O(5), and four equivalent O(2) atoms to form distorted YO8 hexagonal bipyramids that share edges with two equivalent W(3)O6 octahedra and edges with four equivalent W(1)O6 octahedra. In the third Y site, Y(3) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(5), and four equivalent O(3) atoms. There are three inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-59°. In the second W site, W(2) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the third W site, W(3) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form WO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-54°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Y(2), one Y(3), and two equivalent Y(1) atoms to form OY4 tetrahedra that share corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one W(1), and one W(3) atom to form distorted OY2W2 tetrahedra that share corners with two equivalent O(3)Y2W2 tetrahedra, corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with six equivalent O(2)Y2W2 tetrahedra,  an edgeedge with one O(2)Y2W2 tetrahedra,  an edgeedge with one O(3)Y2W2 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, and  an edgeedge with one O(1)Y4 tetrahedra. In the third O site, O(3) is bonded to one Y(1), one Y(3), one W(1), and one W(2) atom to form OY2W2 tetrahedra that share corners with two equivalent O(2)Y2W2 tetrahedra, corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with six equivalent O(3)Y2W2 tetrahedra,  an edgeedge with one O(2)Y2W2 tetrahedra,  an edgeedge with one O(3)Y2W2 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, and  an edgeedge with one O(1)Y4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Y(1), one W(2), and one W(3) atom to form distorted OY2W2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(4)Y2W2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. In the fifth O site, O(5) is bonded to one Y(2), one Y(3), and two equivalent W(1) atoms to form distorted OY2W2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(5)Y2W2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. is represented by the CIF file [CIF]
data_Y2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.333
_cell_length_b   7.333
_cell_length_c   7.434
_cell_angle_alpha   60.951
_cell_angle_beta   60.951
_cell_angle_gamma   60.576
_symmetry_Int_Tables_number   1
_cell_volume   287.933
_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
  Y  Y0  1  0.000  0.500  0.500  1.0
  Y  Y1  1  0.500  0.000  0.500  1.0
  Y  Y2  1  0.500  0.500  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
  W  W4  1  0.500  0.000  0.000  1.0
  W  W5  1  0.000  0.500  0.000  1.0
  W  W6  1  0.000  0.000  0.000  1.0
  W  W7  1  0.000  0.000  0.500  1.0
  O  O8  1  0.375  0.375  0.377  1.0
  O  O9  1  0.625  0.625  0.623  1.0
  O  O10  1  0.088  0.672  0.661  1.0
  O  O11  1  0.356  0.907  0.895  1.0
  O  O12  1  0.672  0.088  0.661  1.0
  O  O13  1  0.090  0.090  0.652  1.0
  O  O14  1  0.661  0.661  0.106  1.0
  O  O15  1  0.093  0.644  0.105  1.0
  O  O16  1  0.644  0.093  0.105  1.0
  O  O17  1  0.339  0.339  0.894  1.0
  O  O18  1  0.910  0.910  0.348  1.0
  O  O19  1  0.912  0.328  0.339  1.0
  O  O20  1  0.907  0.356  0.895  1.0
  O  O21  1  0.328  0.912  0.339  1.0
[/CIF]
.
The crystal structure described by Y2W2O7 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1), two equivalent O(5), and four equivalent O(2) atoms to form distorted YO8 hexagonal bipyramids that share edges with two equivalent W(3)O6 octahedra and edges with four equivalent W(1)O6 octahedra. In the third Y site, Y(3) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(5), and four equivalent O(3) atoms. There are three inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(3)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-59°. In the second W site, W(2) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. In the third W site, W(3) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form WO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 50-54°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Y(2), one Y(3), and two equivalent Y(1) atoms to form OY4 tetrahedra that share corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one W(1), and one W(3) atom to form distorted OY2W2 tetrahedra that share corners with two equivalent O(3)Y2W2 tetrahedra, corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with six equivalent O(2)Y2W2 tetrahedra,  an edgeedge with one O(2)Y2W2 tetrahedra,  an edgeedge with one O(3)Y2W2 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, and  an edgeedge with one O(1)Y4 tetrahedra. In the third O site, O(3) is bonded to one Y(1), one Y(3), one W(1), and one W(2) atom to form OY2W2 tetrahedra that share corners with two equivalent O(2)Y2W2 tetrahedra, corners with two equivalent O(4)Y2W2 tetrahedra, corners with two equivalent O(5)Y2W2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with six equivalent O(3)Y2W2 tetrahedra,  an edgeedge with one O(2)Y2W2 tetrahedra,  an edgeedge with one O(3)Y2W2 tetrahedra,  an edgeedge with one O(4)Y2W2 tetrahedra,  an edgeedge with one O(5)Y2W2 tetrahedra, and  an edgeedge with one O(1)Y4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Y(1), one W(2), and one W(3) atom to form distorted OY2W2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(4)Y2W2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. In the fifth O site, O(5) is bonded to one Y(2), one Y(3), and two equivalent W(1) atoms to form distorted OY2W2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(2)Y2W2 tetrahedra, corners with four equivalent O(3)Y2W2 tetrahedra, corners with four equivalent O(5)Y2W2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, edges with two equivalent O(2)Y2W2 tetrahedra, and edges with two equivalent O(3)Y2W2 tetrahedra. is represented by the CIF file [CIF]
data_Y2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.333
_cell_length_b   7.333
_cell_length_c   7.434
_cell_angle_alpha   60.951
_cell_angle_beta   60.951
_cell_angle_gamma   60.576
_symmetry_Int_Tables_number   1
_cell_volume   287.933
_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
  Y  Y0  1  0.000  0.500  0.500  1.0
  Y  Y1  1  0.500  0.000  0.500  1.0
  Y  Y2  1  0.500  0.500  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
  W  W4  1  0.500  0.000  0.000  1.0
  W  W5  1  0.000  0.500  0.000  1.0
  W  W6  1  0.000  0.000  0.000  1.0
  W  W7  1  0.000  0.000  0.500  1.0
  O  O8  1  0.375  0.375  0.377  1.0
  O  O9  1  0.625  0.625  0.623  1.0
  O  O10  1  0.088  0.672  0.661  1.0
  O  O11  1  0.356  0.907  0.895  1.0
  O  O12  1  0.672  0.088  0.661  1.0
  O  O13  1  0.090  0.090  0.652  1.0
  O  O14  1  0.661  0.661  0.106  1.0
  O  O15  1  0.093  0.644  0.105  1.0
  O  O16  1  0.644  0.093  0.105  1.0
  O  O17  1  0.339  0.339  0.894  1.0
  O  O18  1  0.910  0.910  0.348  1.0
  O  O19  1  0.912  0.328  0.339  1.0
  O  O20  1  0.907  0.356  0.895  1.0
  O  O21  1  0.328  0.912  0.339  1.0
[/CIF]
.