data_KNbW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.52
_cell_length_b   3.52
_cell_length_c   8.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KNbW2
_chemical_formula_sum   'K1 Nb1 W2'
_cell_volume   102.24
_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  0.0  0.0  0.0  1.0
  Nb  Nb1  1  0.0  0.0  0.12  1.0
  W  W2  1  0.76  0.76  0.3  1.0
  W  W3  1  0.76  0.76  0.93  1.0

data_KNbW2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   8.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KNbW2
_chemical_formula_sum   'K2 Nb2 W4'
_cell_volume   204.48
_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  0.0  0.0  0.0  1.0
  Nb  Nb1  2  0.0  0.0  0.12  1.0
  W  W2  2  0.26  0.5  0.3  1.0
  W  W3  2  0.26  0.5  0.93  1.0

K Nb W W
KNbW2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two KNbW2 clusters. K(1) is bonded in a distorted bent 120 degrees geometry to one Nb(1) and one W(2) atom. The K(1)-Nb(1) bond length is 0.97 Å. The K(1)-W(2) bond length is 1.31 Å. Nb(1) is bonded in a distorted single-bond geometry to one K(1) and one W(1) atom. The Nb(1)-W(1) bond length is 1.93 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one Nb(1) atom. In the second W site, W(2) is bonded in a single-bond geometry to one K(1) atom.