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 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. In the third K site, K(3) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), 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 to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the third W site, W(3) is bonded in a rectangular see-saw-like geometry to one O(10), one O(5), one O(8), and one O(9) atom. In the fourth W site, W(4) is bonded in a rectangular see-saw-like geometry to one O(10), 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 to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the fourth O site, O(4) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fifth O site, O(5) is bonded to two equivalent K(1), two equivalent K(3), one W(1), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixth O site, O(6) is bonded to two equivalent K(2), two equivalent K(4), one W(1), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventh O site, O(7) is bonded to two equivalent K(1), two equivalent K(3), one W(2), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the eighth O site, O(8) is bonded to two equivalent K(2), two equivalent K(4), one W(2), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the ninth O site, O(9) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the tenth O site, O(10) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. is represented by the CIF file [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.765
_cell_length_b   5.779
_cell_length_c   8.991
_cell_angle_alpha   108.785
_cell_angle_beta   108.748
_cell_angle_gamma   89.926
_symmetry_Int_Tables_number   1
_cell_volume   266.802
_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  0.393  0.871  0.754  1.0
  K  K1  1  0.641  0.129  0.246  1.0
  K  K2  1  0.895  0.384  0.754  1.0
  K  K3  1  0.140  0.616  0.246  1.0
  W  W4  1  0.018  1.000  0.000  1.0
  W  W5  1  0.518  0.500  1.000  1.0
  W  W6  1  0.764  0.751  0.500  1.0
  W  W7  1  0.271  0.249  0.500  1.0
  O  O8  1  0.759  0.268  0.009  1.0
  O  O9  1  0.764  0.747  0.992  1.0
  O  O10  1  0.271  0.253  0.008  1.0
  O  O11  1  0.276  0.732  0.991  1.0
  O  O12  1  0.885  0.897  0.739  1.0
  O  O13  1  0.150  0.103  0.261  1.0
  O  O14  1  0.386  0.343  0.739  1.0
  O  O15  1  0.649  0.657  0.261  1.0
  O  O16  1  0.017  0.499  0.500  1.0
  O  O17  1  0.517  0.501  0.500  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 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(8) atoms. In the third K site, K(3) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth K site, K(4) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(9), 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 to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the third W site, W(3) is bonded in a rectangular see-saw-like geometry to one O(10), one O(5), one O(8), and one O(9) atom. In the fourth W site, W(4) is bonded in a rectangular see-saw-like geometry to one O(10), 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 to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the fourth O site, O(4) is bonded to one K(1), one K(2), one K(3), one K(4), one W(1), and one W(2) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fifth O site, O(5) is bonded to two equivalent K(1), two equivalent K(3), one W(1), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixth O site, O(6) is bonded to two equivalent K(2), two equivalent K(4), one W(1), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventh O site, O(7) is bonded to two equivalent K(1), two equivalent K(3), one W(2), and one W(4) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the eighth O site, O(8) is bonded to two equivalent K(2), two equivalent K(4), one W(2), and one W(3) atom to form a mixture of distorted corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the ninth O site, O(9) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the tenth O site, O(10) is bonded to one K(1), one K(2), one K(3), one K(4), one W(3), and one W(4) atom to form a mixture of corner, face, and edge-sharing OK4W2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. is represented by the CIF file [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.765
_cell_length_b   5.779
_cell_length_c   8.991
_cell_angle_alpha   108.785
_cell_angle_beta   108.748
_cell_angle_gamma   89.926
_symmetry_Int_Tables_number   1
_cell_volume   266.802
_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  0.393  0.871  0.754  1.0
  K  K1  1  0.641  0.129  0.246  1.0
  K  K2  1  0.895  0.384  0.754  1.0
  K  K3  1  0.140  0.616  0.246  1.0
  W  W4  1  0.018  1.000  0.000  1.0
  W  W5  1  0.518  0.500  1.000  1.0
  W  W6  1  0.764  0.751  0.500  1.0
  W  W7  1  0.271  0.249  0.500  1.0
  O  O8  1  0.759  0.268  0.009  1.0
  O  O9  1  0.764  0.747  0.992  1.0
  O  O10  1  0.271  0.253  0.008  1.0
  O  O11  1  0.276  0.732  0.991  1.0
  O  O12  1  0.885  0.897  0.739  1.0
  O  O13  1  0.150  0.103  0.261  1.0
  O  O14  1  0.386  0.343  0.739  1.0
  O  O15  1  0.649  0.657  0.261  1.0
  O  O16  1  0.017  0.499  0.500  1.0
  O  O17  1  0.517  0.501  0.500  1.0
[/CIF]
.