The structure described by K2W2O7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one W(1) atom. In the second O site, O(2) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to four equivalent K(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent K(1) and two equivalent W(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.883
_cell_length_b   6.039
_cell_length_c   13.685
_cell_angle_alpha   90.000
_cell_angle_beta   89.999
_cell_angle_gamma   90.320
_symmetry_Int_Tables_number   1
_cell_volume   320.937
_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
  K  K0  1  0.008  0.831  0.168  1.0
  K  K1  1  0.992  0.669  0.668  1.0
  K  K2  1  0.992  0.169  0.832  1.0
  K  K3  1  0.008  0.331  0.332  1.0
  W  W4  1  0.459  0.216  0.567  1.0
  W  W5  1  0.541  0.284  0.067  1.0
  W  W6  1  0.541  0.784  0.433  1.0
  W  W7  1  0.459  0.716  0.933  1.0
  O  O8  1  0.496  0.811  0.811  1.0
  O  O9  1  0.504  0.689  0.311  1.0
  O  O10  1  0.504  0.189  0.189  1.0
  O  O11  1  0.496  0.311  0.689  1.0
  O  O12  1  0.503  0.589  0.082  1.0
  O  O13  1  0.497  0.911  0.582  1.0
  O  O14  1  0.497  0.411  0.918  1.0
  O  O15  1  0.503  0.089  0.418  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  0.000  1.000  1.0
  O  O18  1  0.990  0.224  0.555  1.0
  O  O19  1  0.990  0.724  0.945  1.0
  O  O20  1  0.010  0.776  0.445  1.0
  O  O21  1  0.010  0.276  0.055  1.0
[/CIF]
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The structure described by K2W2O7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one W(1) atom. In the second O site, O(2) is bonded to two equivalent K(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing OK2W2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to four equivalent K(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent K(1) and two equivalent W(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.883
_cell_length_b   6.039
_cell_length_c   13.685
_cell_angle_alpha   90.000
_cell_angle_beta   89.999
_cell_angle_gamma   90.320
_symmetry_Int_Tables_number   1
_cell_volume   320.937
_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
  K  K0  1  0.008  0.831  0.168  1.0
  K  K1  1  0.992  0.669  0.668  1.0
  K  K2  1  0.992  0.169  0.832  1.0
  K  K3  1  0.008  0.331  0.332  1.0
  W  W4  1  0.459  0.216  0.567  1.0
  W  W5  1  0.541  0.284  0.067  1.0
  W  W6  1  0.541  0.784  0.433  1.0
  W  W7  1  0.459  0.716  0.933  1.0
  O  O8  1  0.496  0.811  0.811  1.0
  O  O9  1  0.504  0.689  0.311  1.0
  O  O10  1  0.504  0.189  0.189  1.0
  O  O11  1  0.496  0.311  0.689  1.0
  O  O12  1  0.503  0.589  0.082  1.0
  O  O13  1  0.497  0.911  0.582  1.0
  O  O14  1  0.497  0.411  0.918  1.0
  O  O15  1  0.503  0.089  0.418  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  0.000  1.000  1.0
  O  O18  1  0.990  0.224  0.555  1.0
  O  O19  1  0.990  0.724  0.945  1.0
  O  O20  1  0.010  0.776  0.445  1.0
  O  O21  1  0.010  0.276  0.055  1.0
[/CIF]
.