The material structure described by H2W2O7 crystallizes in the triclinic P1 space group. There are four inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one O(13), one O(14), one O(2), one O(4), one O(5), and one O(8) atom. In the second W site, W(2) is bonded in an octahedral geometry to one O(12), one O(13), one O(2), one O(3), one O(8), and one O(9) atom. In the third W site, W(3) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(4), one O(6), and one O(7) atom. In the fourth W site, W(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one W(4) and one H(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one W(1), one W(2), and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one W(2) and one W(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one W(1) and one W(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one W(1) and one W(4) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one W(3) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one W(3), one W(4), and one H(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one W(1), one W(2), and one H(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one W(3) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one W(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one W(2) and one W(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one W(3) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one W(1) and one W(3) atom. is represented by the CIF card [CIF]
data_H2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.943
_cell_length_b   7.055
_cell_length_c   7.238
_cell_angle_alpha   111.463
_cell_angle_beta   90.466
_cell_angle_gamma   114.684
_symmetry_Int_Tables_number   1
_cell_volume   294.340
_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
  H  H0  1  0.611  0.631  0.001  1.0
  H  H1  1  0.286  0.822  0.388  1.0
  H  H2  1  0.376  0.138  0.060  1.0
  H  H3  1  0.871  0.301  0.772  1.0
  W  W4  1  0.963  0.554  0.525  1.0
  W  W5  1  0.058  0.073  0.556  1.0
  W  W6  1  0.472  0.521  0.424  1.0
  W  W7  1  0.960  0.957  0.009  1.0
  O  O8  1  0.726  0.651  0.919  1.0
  O  O9  1  0.152  0.814  0.436  1.0
  O  O10  1  0.126  0.114  0.820  1.0
  O  O11  1  0.674  0.362  0.400  1.0
  O  O12  1  0.067  0.732  0.797  1.0
  O  O13  1  0.483  0.608  0.221  1.0
  O  O14  1  0.280  0.141  0.158  1.0
  O  O15  1  0.911  0.276  0.638  1.0
  O  O16  1  0.931  0.982  0.278  1.0
  O  O17  1  0.470  0.745  0.635  1.0
  O  O18  1  0.814  0.103  0.995  1.0
  O  O19  1  0.322  0.281  0.557  1.0
  O  O20  1  0.821  0.763  0.533  1.0
  O  O21  1  0.126  0.431  0.379  1.0
[/CIF]
.
The material structure described by H2W2O7 crystallizes in the triclinic P1 space group. There are four inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one O(13), one O(14), one O(2), one O(4), one O(5), and one O(8) atom. In the second W site, W(2) is bonded in an octahedral geometry to one O(12), one O(13), one O(2), one O(3), one O(8), and one O(9) atom. In the third W site, W(3) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(4), one O(6), and one O(7) atom. In the fourth W site, W(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), and one O(9) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one W(4) and one H(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one W(1), one W(2), and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one W(2) and one W(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one W(1) and one W(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one W(1) and one W(4) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one W(3) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one W(3), one W(4), and one H(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one W(1), one W(2), and one H(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one W(3) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one W(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one W(2) and one W(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one W(3) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one W(1) and one W(3) atom. is represented by the CIF card [CIF]
data_H2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.943
_cell_length_b   7.055
_cell_length_c   7.238
_cell_angle_alpha   111.463
_cell_angle_beta   90.466
_cell_angle_gamma   114.684
_symmetry_Int_Tables_number   1
_cell_volume   294.340
_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
  H  H0  1  0.611  0.631  0.001  1.0
  H  H1  1  0.286  0.822  0.388  1.0
  H  H2  1  0.376  0.138  0.060  1.0
  H  H3  1  0.871  0.301  0.772  1.0
  W  W4  1  0.963  0.554  0.525  1.0
  W  W5  1  0.058  0.073  0.556  1.0
  W  W6  1  0.472  0.521  0.424  1.0
  W  W7  1  0.960  0.957  0.009  1.0
  O  O8  1  0.726  0.651  0.919  1.0
  O  O9  1  0.152  0.814  0.436  1.0
  O  O10  1  0.126  0.114  0.820  1.0
  O  O11  1  0.674  0.362  0.400  1.0
  O  O12  1  0.067  0.732  0.797  1.0
  O  O13  1  0.483  0.608  0.221  1.0
  O  O14  1  0.280  0.141  0.158  1.0
  O  O15  1  0.911  0.276  0.638  1.0
  O  O16  1  0.931  0.982  0.278  1.0
  O  O17  1  0.470  0.745  0.635  1.0
  O  O18  1  0.814  0.103  0.995  1.0
  O  O19  1  0.322  0.281  0.557  1.0
  O  O20  1  0.821  0.763  0.533  1.0
  O  O21  1  0.126  0.431  0.379  1.0
[/CIF]
.