data_K2W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.37
_cell_length_b   8.37
_cell_length_c   9.33
_cell_angle_alpha   108.65
_cell_angle_beta   108.65
_cell_angle_gamma   23.6
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2W
_chemical_formula_sum   'K4 W2'
_cell_volume   247.28
_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  0.81  0.0  0.31  1.0
  K  K1  1  0.62  0.0  0.98  1.0
  K  K2  1  0.72  0.0  0.84  1.0
  K  K3  1  0.53  0.0  0.51  1.0
  W  W4  1  0.24  0.0  0.06  1.0
  W  W5  1  0.1  0.0  0.75  1.0

data_K2W
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.42
_cell_length_b   8.37
_cell_length_c   9.33
_cell_angle_alpha   108.65
_cell_angle_beta   90.0
_cell_angle_gamma   101.8
_symmetry_Int_Tables_number   2
_chemical_formula_structural   K2W
_chemical_formula_sum   'K4 W2'
_cell_volume   247.28
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.0  0.05  0.93  1.0
  K  K1  2  0.0  0.14  0.4  1.0
  W  W2  2  0.0  0.43  0.85  1.0

K K K K W W
K2W crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to one K(2), three equivalent K(1), and one W(1) atom to form a mixture of distorted corner and edge-sharing KK4W square pyramids. The K(1)-K(2) bond length is 2.99 Å. There is one shorter (3.36 Å) and two longer (3.42 Å) K(1)-K(1) bond lengths. The K(1)-W(1) bond length is 4.08 Å. In the second K site, K(2) is bonded in a 2-coordinate geometry to one K(1), one K(2), and two equivalent W(1) atoms. The K(2)-K(2) bond length is 1.83 Å. There is one shorter (3.49 Å) and one longer (4.14 Å) K(2)-W(1) bond length. W(1) is bonded in a 6-coordinate geometry to one K(1), two equivalent K(2), and three equivalent W(1) atoms. There is one shorter (2.74 Å) and two longer (3.42 Å) W(1)-W(1) bond lengths.