The compound described by K2W2O5 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a distorted single-bond geometry to one W(4), one O(2), two equivalent O(5), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a distorted single-bond geometry to one W(4), one O(3), two equivalent O(6), and two equivalent O(8) atoms. In the third K site, K(3) is bonded in a distorted linear geometry to one W(4), one O(10), one O(3), two equivalent O(5), and two equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a distorted linear geometry to one W(4), one O(10), one O(2), two equivalent O(6), and two equivalent O(8) atoms. There are four inequivalent W sites. In the first W site, W(1) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second W site, W(2) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third W site, W(3) is bonded in a distorted water-like geometry to one O(10), one O(5), one O(6), one O(8), and one O(9) atom. In the fourth W site, W(4) is bonded in a 9-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one O(10), one O(5), one O(6), one O(7), and one O(9) atom. There are ten 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 distorted rectangular see-saw-like geometry to one K(1), one K(4), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one K(2), one K(3), one W(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one W(1) and one W(2) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent K(3), one W(3), and one W(4) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to two equivalent K(2), two equivalent K(4), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(3), one W(1), one W(4), and one O(9) atom. In the eighth O site, O(8) is bonded in a 7-coordinate geometry to two equivalent K(2), two equivalent K(4), one W(1), one W(3), and one O(9) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one W(3), one W(4), one O(7), and one O(8) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one K(3), one K(4), one W(3), and one W(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.823
_cell_length_b   5.832
_cell_length_c   8.983
_cell_angle_alpha   108.857
_cell_angle_beta   108.667
_cell_angle_gamma   90.379
_symmetry_Int_Tables_number   1
_cell_volume   271.442
_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  0.134  0.638  0.757  1.0
  K  K1  1  0.875  0.398  0.244  1.0
  K  K2  1  0.619  0.142  0.756  1.0
  K  K3  1  0.388  0.893  0.244  1.0
  W  W4  1  0.999  0.018  1.000  1.0
  W  W5  1  0.499  0.517  0.001  1.0
  W  W6  1  0.269  0.260  0.500  1.0
  W  W7  1  0.778  0.777  0.500  1.0
  O  O8  1  0.744  0.761  0.009  1.0
  O  O9  1  0.240  0.789  0.989  1.0
  O  O10  1  0.759  0.248  0.011  1.0
  O  O11  1  0.255  0.273  0.991  1.0
  O  O12  1  0.099  0.148  0.739  1.0
  O  O13  1  0.894  0.889  0.261  1.0
  O  O14  1  0.660  0.644  0.739  1.0
  O  O15  1  0.336  0.390  0.261  1.0
  O  O16  1  0.475  0.515  0.501  1.0
  O  O17  1  0.478  0.013  0.496  1.0
[/CIF]
.
The compound described by K2W2O5 crystallizes in the triclinic P1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a distorted single-bond geometry to one W(4), one O(2), two equivalent O(5), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a distorted single-bond geometry to one W(4), one O(3), two equivalent O(6), and two equivalent O(8) atoms. In the third K site, K(3) is bonded in a distorted linear geometry to one W(4), one O(10), one O(3), two equivalent O(5), and two equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a distorted linear geometry to one W(4), one O(10), one O(2), two equivalent O(6), and two equivalent O(8) atoms. There are four inequivalent W sites. In the first W site, W(1) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second W site, W(2) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third W site, W(3) is bonded in a distorted water-like geometry to one O(10), one O(5), one O(6), one O(8), and one O(9) atom. In the fourth W site, W(4) is bonded in a 9-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one O(10), one O(5), one O(6), one O(7), and one O(9) atom. There are ten 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 distorted rectangular see-saw-like geometry to one K(1), one K(4), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one K(2), one K(3), one W(1), and one W(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one W(1) and one W(2) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent K(3), one W(3), and one W(4) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to two equivalent K(2), two equivalent K(4), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(3), one W(1), one W(4), and one O(9) atom. In the eighth O site, O(8) is bonded in a 7-coordinate geometry to two equivalent K(2), two equivalent K(4), one W(1), one W(3), and one O(9) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one W(3), one W(4), one O(7), and one O(8) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one K(3), one K(4), one W(3), and one W(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.823
_cell_length_b   5.832
_cell_length_c   8.983
_cell_angle_alpha   108.857
_cell_angle_beta   108.667
_cell_angle_gamma   90.379
_symmetry_Int_Tables_number   1
_cell_volume   271.442
_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  0.134  0.638  0.757  1.0
  K  K1  1  0.875  0.398  0.244  1.0
  K  K2  1  0.619  0.142  0.756  1.0
  K  K3  1  0.388  0.893  0.244  1.0
  W  W4  1  0.999  0.018  1.000  1.0
  W  W5  1  0.499  0.517  0.001  1.0
  W  W6  1  0.269  0.260  0.500  1.0
  W  W7  1  0.778  0.777  0.500  1.0
  O  O8  1  0.744  0.761  0.009  1.0
  O  O9  1  0.240  0.789  0.989  1.0
  O  O10  1  0.759  0.248  0.011  1.0
  O  O11  1  0.255  0.273  0.991  1.0
  O  O12  1  0.099  0.148  0.739  1.0
  O  O13  1  0.894  0.889  0.261  1.0
  O  O14  1  0.660  0.644  0.739  1.0
  O  O15  1  0.336  0.390  0.261  1.0
  O  O16  1  0.475  0.515  0.501  1.0
  O  O17  1  0.478  0.013  0.496  1.0
[/CIF]
.