The material described by K2W2O5 crystallizes in the orthorhombic Ima2 space group. K(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 8°. In the second W site, W(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form WO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent W(1) atoms to form OK4W2 octahedra that share corners with two equivalent O(1)K4W2 octahedra, corners with four equivalent O(3)K2W2 tetrahedra, edges with two equivalent O(1)K4W2 octahedra, and faces with four equivalent O(1)K4W2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to two equivalent K(1) and two equivalent W(2) atoms to form distorted OK2W2 tetrahedra that share corners with eight equivalent O(1)K4W2 octahedra and corners with two equivalent O(3)K2W2 tetrahedra. The corner-sharing octahedral tilt angles range from 19-83°. is represented by the CIF file [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.057
_cell_length_b   9.057
_cell_length_c   9.057
_cell_angle_alpha   141.969
_cell_angle_beta   141.623
_cell_angle_gamma   55.137
_symmetry_Int_Tables_number   1
_cell_volume   282.144
_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  0.874  0.391  0.479  1.0
  K  K1  1  0.126  0.605  0.518  1.0
  K  K2  1  0.412  0.891  0.518  1.0
  K  K3  1  0.588  0.105  0.479  1.0
  W  W4  1  0.000  0.984  0.984  1.0
  W  W5  1  0.500  0.484  0.984  1.0
  W  W6  1  0.812  0.804  0.116  1.0
  W  W7  1  0.188  0.304  0.992  1.0
  O  O8  1  0.757  0.747  0.486  1.0
  O  O9  1  0.243  0.729  0.990  1.0
  O  O10  1  0.761  0.247  0.990  1.0
  O  O11  1  0.239  0.229  0.486  1.0
  O  O12  1  0.824  0.842  0.940  1.0
  O  O13  1  0.176  0.116  0.018  1.0
  O  O14  1  0.402  0.342  0.018  1.0
  O  O15  1  0.598  0.616  0.940  1.0
  O  O16  1  0.899  0.118  0.517  1.0
  O  O17  1  0.101  0.618  0.218  1.0
[/CIF]
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The material described by K2W2O5 crystallizes in the orthorhombic Ima2 space group. K(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 8°. In the second W site, W(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form WO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent W(1) atoms to form OK4W2 octahedra that share corners with two equivalent O(1)K4W2 octahedra, corners with four equivalent O(3)K2W2 tetrahedra, edges with two equivalent O(1)K4W2 octahedra, and faces with four equivalent O(1)K4W2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to two equivalent K(1) and two equivalent W(2) atoms to form distorted OK2W2 tetrahedra that share corners with eight equivalent O(1)K4W2 octahedra and corners with two equivalent O(3)K2W2 tetrahedra. The corner-sharing octahedral tilt angles range from 19-83°. is represented by the CIF file [CIF]
data_K2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.057
_cell_length_b   9.057
_cell_length_c   9.057
_cell_angle_alpha   141.969
_cell_angle_beta   141.623
_cell_angle_gamma   55.137
_symmetry_Int_Tables_number   1
_cell_volume   282.144
_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  0.874  0.391  0.479  1.0
  K  K1  1  0.126  0.605  0.518  1.0
  K  K2  1  0.412  0.891  0.518  1.0
  K  K3  1  0.588  0.105  0.479  1.0
  W  W4  1  0.000  0.984  0.984  1.0
  W  W5  1  0.500  0.484  0.984  1.0
  W  W6  1  0.812  0.804  0.116  1.0
  W  W7  1  0.188  0.304  0.992  1.0
  O  O8  1  0.757  0.747  0.486  1.0
  O  O9  1  0.243  0.729  0.990  1.0
  O  O10  1  0.761  0.247  0.990  1.0
  O  O11  1  0.239  0.229  0.486  1.0
  O  O12  1  0.824  0.842  0.940  1.0
  O  O13  1  0.176  0.116  0.018  1.0
  O  O14  1  0.402  0.342  0.018  1.0
  O  O15  1  0.598  0.616  0.940  1.0
  O  O16  1  0.899  0.118  0.517  1.0
  O  O17  1  0.101  0.618  0.218  1.0
[/CIF]
.