data_KSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.78
_cell_length_b   4.78
_cell_length_c   10.42
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KSb
_chemical_formula_sum   'K2 Sb2'
_cell_volume   206.33
_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  0.39  0.38  0.28  1.0
  K  K1  1  0.0  0.76  0.14  1.0
  Sb  Sb2  1  0.39  0.38  0.64  1.0
  Sb  Sb3  1  0.0  0.76  0.78  1.0

data_KSb
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   8.28
_cell_length_b   4.78
_cell_length_c   10.42
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   KSb
_chemical_formula_sum   'K4 Sb4'
_cell_volume   412.66
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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  4  0.19  0.0  0.07  1.0
  Sb  Sb1  4  0.19  0.0  0.43  1.0

K K Sb Sb
K K Sb Sb 0 1 o - o 0 1 o o o 0 1 + o o 2 3 o - o 2 3 o o o 2 3 + o o 
KSb crystallizes in the triclinic P-1 space group. K(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one Sb(1) atom. There are a spread of K(1)-K(1) bond distances ranging from 2.91-3.49 Å. The K(1)-Sb(1) bond length is 3.76 Å. Sb(1) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Sb(1) atoms. There is one shorter (2.96 Å) and one longer (3.00 Å) Sb(1)-Sb(1) bond length.