data_K2SbW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.86
_cell_length_b   4.86
_cell_length_c   5.62
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2SbW
_chemical_formula_sum   'K2 Sb1 W1'
_cell_volume   132.61
_cell_formula_units_Z   1
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  0.43  0.43  0.22  1.0
  K  K1  1  0.43  0.43  0.4  1.0
  Sb  Sb2  1  0.0  0.0  0.0  1.0
  W  W3  1  0.0  0.0  0.81  1.0

data_K2SbW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.87
_cell_length_b   6.87
_cell_length_c   5.62
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2SbW
_chemical_formula_sum   'K4 Sb2 W2'
_cell_volume   265.21
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.43  0.0  0.22  1.0
  K  K1  2  0.43  0.0  0.4  1.0
  Sb  Sb2  2  0.0  0.0  0.0  1.0
  W  W3  2  0.0  0.0  0.81  1.0

K K Sb W
K K Sb W 0 1 o o o 2 3 o o - 
K2WSb crystallizes in the monoclinic Cm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one K(2) and three equivalent Sb(1) atoms. The K(1)-K(2) bond length is 0.99 Å. There is one shorter (3.20 Å) and two longer (3.68 Å) K(1)-Sb(1) bond lengths. In the second K site, K(2) is bonded in a 4-coordinate geometry to one K(1) and three equivalent W(1) atoms. There is one shorter (3.75 Å) and two longer (4.17 Å) K(2)-W(1) bond lengths. W(1) is bonded in a distorted single-bond geometry to three equivalent K(2) and one Sb(1) atom. The W(1)-Sb(1) bond length is 1.08 Å. Sb(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one W(1) atom.