The compound described by WO2 crystallizes in the monoclinic Cm space group. There are nine inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(9)O4 tetrahedra, corners with two equivalent W(6)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(5) atoms to form WO6 octahedra that share  a cornercorner with one W(9)O4 tetrahedra, corners with two equivalent W(6)O4 tetrahedra, and edges with four equivalent W(1)O6 octahedra. In the third W site, W(3) is bonded to one O(11), one O(12), one O(14), one O(4), one O(6), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one W(6)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, edges with two equivalent W(3)O6 octahedra, and edges with two equivalent W(4)O6 octahedra. In the fourth W site, W(4) is bonded to one O(14), one O(6), two equivalent O(11), and two equivalent O(4) atoms to form distorted WO6 octahedra that share  a cornercorner with one W(6)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, and edges with four equivalent W(3)O6 octahedra. In the fifth W site, W(5) is bonded to one O(12), one O(15), two equivalent O(10), and two equivalent O(11) atoms to form edge-sharing WO6 octahedra. In the sixth W site, W(6) is bonded to one O(14), one O(7), and two equivalent O(5) atoms to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the seventh W site, W(7) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form WO6 octahedra that share corners with two equivalent W(9)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, edges with two equivalent W(7)O6 octahedra, and edges with two equivalent W(8)O6 octahedra. In the eighth W site, W(8) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(16) atoms to form distorted WO6 octahedra that share corners with two equivalent W(9)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, and edges with four equivalent W(7)O6 octahedra. In the ninth W site, W(9) is bonded to one O(17), one O(8), and two equivalent O(16) atoms to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-60°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one W(2) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a water-like geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a water-like geometry to one W(3) and one W(4) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one W(1), one W(2), and one W(6) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one W(4) and two equivalent W(3) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one W(6) and two equivalent W(1) atoms. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to one W(2), one W(9), and two equivalent W(1) atoms. In the ninth O site, O(9) is bonded in a water-like geometry to two equivalent W(3) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one W(5), one W(7), and one W(8) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one W(3), one W(4), and one W(5) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one W(5) and two equivalent W(3) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(8) and two equivalent W(7) atoms. In the fourteenth O site, O(14) is bonded in a distorted trigonal pyramidal geometry to one W(4), one W(6), and two equivalent W(3) atoms. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one W(5) and two equivalent W(7) atoms. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one W(7), one W(8), and one W(9) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one W(9) and two equivalent W(7) atoms. In the eighteenth O site, O(18) is bonded in a trigonal non-coplanar geometry to one W(8) and two equivalent W(7) atoms. is represented by the CIF file [CIF]
data_WO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.484
_cell_length_b   6.484
_cell_length_c   15.032
_cell_angle_alpha   89.583
_cell_angle_beta   89.583
_cell_angle_gamma   60.593
_symmetry_Int_Tables_number   1
_cell_volume   550.562
_cell_formula_units_Z   12
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
  W  W0  1  0.659  0.182  0.169  1.0
  W  W1  1  0.660  0.660  0.170  1.0
  W  W2  1  0.994  0.515  0.491  1.0
  W  W3  1  0.182  0.659  0.169  1.0
  W  W4  1  0.991  0.991  0.489  1.0
  W  W5  1  0.166  0.166  0.662  1.0
  W  W6  1  0.166  0.166  0.274  1.0
  W  W7  1  0.334  0.837  0.835  1.0
  W  W8  1  0.515  0.994  0.491  1.0
  W  W9  1  0.330  0.330  0.844  1.0
  W  W10  1  0.837  0.334  0.835  1.0
  W  W11  1  0.834  0.834  0.958  1.0
  O  O12  1  0.355  0.802  0.107  1.0
  O  O13  1  0.498  0.498  0.243  1.0
  O  O14  1  0.350  0.350  0.106  1.0
  O  O15  1  0.802  0.355  0.107  1.0
  O  O16  1  0.681  0.150  0.433  1.0
  O  O17  1  0.507  0.998  0.241  1.0
  O  O18  1  0.839  0.839  0.563  1.0
  O  O19  1  0.994  0.994  0.239  1.0
  O  O20  1  0.835  0.835  0.094  1.0
  O  O21  1  0.685  0.685  0.430  1.0
  O  O22  1  0.150  0.681  0.433  1.0
  O  O23  1  0.998  0.507  0.241  1.0
  O  O24  1  0.028  0.440  0.757  1.0
  O  O25  1  0.896  0.296  0.563  1.0
  O  O26  1  0.301  0.301  0.568  1.0
  O  O27  1  0.151  0.151  0.905  1.0
  O  O28  1  0.162  0.162  0.411  1.0
  O  O29  1  0.027  0.027  0.754  1.0
  O  O30  1  0.440  0.028  0.757  1.0
  O  O31  1  0.296  0.896  0.563  1.0
  O  O32  1  0.160  0.682  0.911  1.0
  O  O33  1  0.674  0.674  0.905  1.0
  O  O34  1  0.505  0.505  0.782  1.0
  O  O35  1  0.682  0.160  0.911  1.0
[/CIF]
.
The compound described by WO2 crystallizes in the monoclinic Cm space group. There are nine inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(9)O4 tetrahedra, corners with two equivalent W(6)O4 tetrahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(5) atoms to form WO6 octahedra that share  a cornercorner with one W(9)O4 tetrahedra, corners with two equivalent W(6)O4 tetrahedra, and edges with four equivalent W(1)O6 octahedra. In the third W site, W(3) is bonded to one O(11), one O(12), one O(14), one O(4), one O(6), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one W(6)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, edges with two equivalent W(3)O6 octahedra, and edges with two equivalent W(4)O6 octahedra. In the fourth W site, W(4) is bonded to one O(14), one O(6), two equivalent O(11), and two equivalent O(4) atoms to form distorted WO6 octahedra that share  a cornercorner with one W(6)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, and edges with four equivalent W(3)O6 octahedra. In the fifth W site, W(5) is bonded to one O(12), one O(15), two equivalent O(10), and two equivalent O(11) atoms to form edge-sharing WO6 octahedra. In the sixth W site, W(6) is bonded to one O(14), one O(7), and two equivalent O(5) atoms to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-60°. In the seventh W site, W(7) is bonded to one O(10), one O(13), one O(15), one O(16), one O(17), and one O(18) atom to form WO6 octahedra that share corners with two equivalent W(9)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, edges with two equivalent W(7)O6 octahedra, and edges with two equivalent W(8)O6 octahedra. In the eighth W site, W(8) is bonded to one O(13), one O(18), two equivalent O(10), and two equivalent O(16) atoms to form distorted WO6 octahedra that share corners with two equivalent W(9)O4 tetrahedra,  an edgeedge with one W(5)O6 octahedra, and edges with four equivalent W(7)O6 octahedra. In the ninth W site, W(9) is bonded to one O(17), one O(8), and two equivalent O(16) atoms to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-60°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one W(2) and two equivalent W(1) atoms. In the third O site, O(3) is bonded in a water-like geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a water-like geometry to one W(3) and one W(4) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one W(1), one W(2), and one W(6) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one W(4) and two equivalent W(3) atoms. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one W(6) and two equivalent W(1) atoms. In the eighth O site, O(8) is bonded in a distorted tetrahedral geometry to one W(2), one W(9), and two equivalent W(1) atoms. In the ninth O site, O(9) is bonded in a water-like geometry to two equivalent W(3) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one W(5), one W(7), and one W(8) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one W(3), one W(4), and one W(5) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one W(5) and two equivalent W(3) atoms. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(8) and two equivalent W(7) atoms. In the fourteenth O site, O(14) is bonded in a distorted trigonal pyramidal geometry to one W(4), one W(6), and two equivalent W(3) atoms. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one W(5) and two equivalent W(7) atoms. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one W(7), one W(8), and one W(9) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one W(9) and two equivalent W(7) atoms. In the eighteenth O site, O(18) is bonded in a trigonal non-coplanar geometry to one W(8) and two equivalent W(7) atoms. is represented by the CIF file [CIF]
data_WO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.484
_cell_length_b   6.484
_cell_length_c   15.032
_cell_angle_alpha   89.583
_cell_angle_beta   89.583
_cell_angle_gamma   60.593
_symmetry_Int_Tables_number   1
_cell_volume   550.562
_cell_formula_units_Z   12
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
  W  W0  1  0.659  0.182  0.169  1.0
  W  W1  1  0.660  0.660  0.170  1.0
  W  W2  1  0.994  0.515  0.491  1.0
  W  W3  1  0.182  0.659  0.169  1.0
  W  W4  1  0.991  0.991  0.489  1.0
  W  W5  1  0.166  0.166  0.662  1.0
  W  W6  1  0.166  0.166  0.274  1.0
  W  W7  1  0.334  0.837  0.835  1.0
  W  W8  1  0.515  0.994  0.491  1.0
  W  W9  1  0.330  0.330  0.844  1.0
  W  W10  1  0.837  0.334  0.835  1.0
  W  W11  1  0.834  0.834  0.958  1.0
  O  O12  1  0.355  0.802  0.107  1.0
  O  O13  1  0.498  0.498  0.243  1.0
  O  O14  1  0.350  0.350  0.106  1.0
  O  O15  1  0.802  0.355  0.107  1.0
  O  O16  1  0.681  0.150  0.433  1.0
  O  O17  1  0.507  0.998  0.241  1.0
  O  O18  1  0.839  0.839  0.563  1.0
  O  O19  1  0.994  0.994  0.239  1.0
  O  O20  1  0.835  0.835  0.094  1.0
  O  O21  1  0.685  0.685  0.430  1.0
  O  O22  1  0.150  0.681  0.433  1.0
  O  O23  1  0.998  0.507  0.241  1.0
  O  O24  1  0.028  0.440  0.757  1.0
  O  O25  1  0.896  0.296  0.563  1.0
  O  O26  1  0.301  0.301  0.568  1.0
  O  O27  1  0.151  0.151  0.905  1.0
  O  O28  1  0.162  0.162  0.411  1.0
  O  O29  1  0.027  0.027  0.754  1.0
  O  O30  1  0.440  0.028  0.757  1.0
  O  O31  1  0.296  0.896  0.563  1.0
  O  O32  1  0.160  0.682  0.911  1.0
  O  O33  1  0.674  0.674  0.905  1.0
  O  O34  1  0.505  0.505  0.782  1.0
  O  O35  1  0.682  0.160  0.911  1.0
[/CIF]
.