data_KCo3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.72
_cell_length_b   2.72
_cell_length_c   8.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KCo3
_chemical_formula_sum   'K1 Co3'
_cell_volume   60.8
_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  K3  1  0.0  0.0  0.0  1.0
  Co  Co0  1  0.36  0.36  0.5  1.0
  Co  Co1  1  0.0  0.0  0.1  1.0
  Co  Co2  1  0.36  0.36  0.71  1.0

data_KCo3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.85
_cell_length_b   3.85
_cell_length_c   8.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KCo3
_chemical_formula_sum   'K2 Co6'
_cell_volume   121.59
_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
  Co  Co1  2  0.0  0.0  0.1  1.0
  Co  Co2  2  0.36  0.0  0.5  1.0
  Co  Co3  2  0.36  0.0  0.71  1.0

K Co Co Co
KCo3 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two KCo3 clusters. K(1) is bonded in a single-bond geometry to one Co(2) and one Co(3) atom. The K(1)-Co(2) bond length is 0.85 Å. The K(1)-Co(3) bond length is 2.75 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted single-bond geometry to one Co(3) atom. The Co(1)-Co(3) bond length is 1.75 Å. In the second Co site, Co(2) is bonded in a single-bond geometry to one K(1) atom. In the third Co site, Co(3) is bonded in a 2-coordinate geometry to one K(1) and one Co(1) atom.