The compound described by W3O7 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 10-21°. In the second W site, W(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-21°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one W(2) and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent W(2) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_W3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.858
_cell_length_b   6.361
_cell_length_c   6.633
_cell_angle_alpha   118.649
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   142.844
_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
  O  O0  1  0.500  0.572  0.727  1.0
  O  O1  1  0.500  0.844  0.273  1.0
  O  O2  1  0.500  0.156  0.727  1.0
  O  O3  1  0.500  0.428  0.273  1.0
  O  O4  1  0.000  0.500  0.000  1.0
  O  O5  1  1.000  0.212  0.425  1.0
  O  O6  1  0.000  0.788  0.575  1.0
  W  W7  1  0.500  0.773  0.546  1.0
  W  W8  1  0.500  0.227  0.454  1.0
  W  W9  1  0.500  0.500  0.000  1.0
[/CIF]
.
The compound described by W3O7 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 10-21°. In the second W site, W(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-21°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one W(2) and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent W(2) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_W3O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.858
_cell_length_b   6.361
_cell_length_c   6.633
_cell_angle_alpha   118.649
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   142.844
_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
  O  O0  1  0.500  0.572  0.727  1.0
  O  O1  1  0.500  0.844  0.273  1.0
  O  O2  1  0.500  0.156  0.727  1.0
  O  O3  1  0.500  0.428  0.273  1.0
  O  O4  1  0.000  0.500  0.000  1.0
  O  O5  1  1.000  0.212  0.425  1.0
  O  O6  1  0.000  0.788  0.575  1.0
  W  W7  1  0.500  0.773  0.546  1.0
  W  W8  1  0.500  0.227  0.454  1.0
  W  W9  1  0.500  0.500  0.000  1.0
[/CIF]
.