The crystal structure described by W2Cu2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. In the second W site, W(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(7), and two equivalent O(6) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one Cu(1) atom. In the sixth O site, O(6) is bonded to one W(1), two equivalent W(2), and one Cu(1) atom to form distorted edge-sharing OCuW3 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Cu(2) atom. is represented by the CIF card [CIF]
data_Cu2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.294
_cell_length_b   6.897
_cell_length_c   7.153
_cell_angle_alpha   103.008
_cell_angle_beta   90.555
_cell_angle_gamma   101.440
_symmetry_Int_Tables_number   1
_cell_volume   296.073
_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
  Cu  Cu0  1  0.717  0.247  0.711  1.0
  Cu  Cu1  1  0.706  0.721  0.079  1.0
  Cu  Cu2  1  0.294  0.279  0.921  1.0
  Cu  Cu3  1  0.283  0.753  0.289  1.0
  W  W4  1  0.723  0.277  0.210  1.0
  W  W5  1  0.721  0.705  0.561  1.0
  W  W6  1  0.279  0.295  0.439  1.0
  W  W7  1  0.277  0.723  0.790  1.0
  O  O8  1  0.987  0.673  0.664  1.0
  O  O9  1  0.799  0.296  0.972  1.0
  O  O10  1  0.666  0.008  0.190  1.0
  O  O11  1  0.772  0.611  0.295  1.0
  O  O12  1  0.771  0.970  0.582  1.0
  O  O13  1  0.610  0.354  0.504  1.0
  O  O14  1  0.591  0.702  0.818  1.0
  O  O15  1  0.409  0.298  0.182  1.0
  O  O16  1  0.390  0.646  0.496  1.0
  O  O17  1  0.229  0.030  0.418  1.0
  O  O18  1  0.228  0.389  0.705  1.0
  O  O19  1  0.334  0.992  0.810  1.0
  O  O20  1  0.201  0.704  0.028  1.0
  O  O21  1  0.013  0.327  0.336  1.0
[/CIF]
.
The crystal structure described by W2Cu2O7 crystallizes in the triclinic P-1 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. In the second W site, W(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(7), and two equivalent O(6) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one Cu(1) atom. In the sixth O site, O(6) is bonded to one W(1), two equivalent W(2), and one Cu(1) atom to form distorted edge-sharing OCuW3 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Cu(2) atom. is represented by the CIF card [CIF]
data_Cu2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.294
_cell_length_b   6.897
_cell_length_c   7.153
_cell_angle_alpha   103.008
_cell_angle_beta   90.555
_cell_angle_gamma   101.440
_symmetry_Int_Tables_number   1
_cell_volume   296.073
_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
  Cu  Cu0  1  0.717  0.247  0.711  1.0
  Cu  Cu1  1  0.706  0.721  0.079  1.0
  Cu  Cu2  1  0.294  0.279  0.921  1.0
  Cu  Cu3  1  0.283  0.753  0.289  1.0
  W  W4  1  0.723  0.277  0.210  1.0
  W  W5  1  0.721  0.705  0.561  1.0
  W  W6  1  0.279  0.295  0.439  1.0
  W  W7  1  0.277  0.723  0.790  1.0
  O  O8  1  0.987  0.673  0.664  1.0
  O  O9  1  0.799  0.296  0.972  1.0
  O  O10  1  0.666  0.008  0.190  1.0
  O  O11  1  0.772  0.611  0.295  1.0
  O  O12  1  0.771  0.970  0.582  1.0
  O  O13  1  0.610  0.354  0.504  1.0
  O  O14  1  0.591  0.702  0.818  1.0
  O  O15  1  0.409  0.298  0.182  1.0
  O  O16  1  0.390  0.646  0.496  1.0
  O  O17  1  0.229  0.030  0.418  1.0
  O  O18  1  0.228  0.389  0.705  1.0
  O  O19  1  0.334  0.992  0.810  1.0
  O  O20  1  0.201  0.704  0.028  1.0
  O  O21  1  0.013  0.327  0.336  1.0
[/CIF]
.