The structure described by K4Co2O5 crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. In the second K site, K(2) is bonded to four equivalent O(2) atoms to form distorted corner-sharing KO4 trigonal pyramids. Co(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent K(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded to two equivalent K(1), two equivalent K(2), and one Co(1) atom to form a mixture of distorted edge and corner-sharing OK4Co trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.102
_cell_length_b   7.102
_cell_length_c   10.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   524.686
_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  0.500  0.500  0.268  1.0
  K  K1  1  0.500  0.000  0.250  1.0
  K  K2  1  0.500  0.500  0.732  1.0
  K  K3  1  0.500  0.000  0.750  1.0
  K  K4  1  0.000  0.000  0.232  1.0
  K  K5  1  0.000  0.000  0.768  1.0
  K  K6  1  0.000  0.500  0.250  1.0
  K  K7  1  0.000  0.500  0.750  1.0
  Co  Co8  1  0.676  0.324  0.000  1.0
  Co  Co9  1  0.824  0.824  0.500  1.0
  Co  Co10  1  0.176  0.176  0.500  1.0
  Co  Co11  1  0.324  0.676  0.000  1.0
  O  O12  1  0.500  0.500  0.000  1.0
  O  O13  1  0.758  0.758  0.344  1.0
  O  O14  1  0.758  0.758  0.656  1.0
  O  O15  1  0.742  0.258  0.844  1.0
  O  O16  1  0.742  0.258  0.156  1.0
  O  O17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.258  0.742  0.156  1.0
  O  O19  1  0.258  0.742  0.844  1.0
  O  O20  1  0.242  0.242  0.656  1.0
  O  O21  1  0.242  0.242  0.344  1.0
[/CIF]
.
The structure described by K4Co2O5 crystallizes in the tetragonal P4_2/mnm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. In the second K site, K(2) is bonded to four equivalent O(2) atoms to form distorted corner-sharing KO4 trigonal pyramids. Co(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent K(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded to two equivalent K(1), two equivalent K(2), and one Co(1) atom to form a mixture of distorted edge and corner-sharing OK4Co trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_K4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.102
_cell_length_b   7.102
_cell_length_c   10.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   524.686
_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  0.500  0.500  0.268  1.0
  K  K1  1  0.500  0.000  0.250  1.0
  K  K2  1  0.500  0.500  0.732  1.0
  K  K3  1  0.500  0.000  0.750  1.0
  K  K4  1  0.000  0.000  0.232  1.0
  K  K5  1  0.000  0.000  0.768  1.0
  K  K6  1  0.000  0.500  0.250  1.0
  K  K7  1  0.000  0.500  0.750  1.0
  Co  Co8  1  0.676  0.324  0.000  1.0
  Co  Co9  1  0.824  0.824  0.500  1.0
  Co  Co10  1  0.176  0.176  0.500  1.0
  Co  Co11  1  0.324  0.676  0.000  1.0
  O  O12  1  0.500  0.500  0.000  1.0
  O  O13  1  0.758  0.758  0.344  1.0
  O  O14  1  0.758  0.758  0.656  1.0
  O  O15  1  0.742  0.258  0.844  1.0
  O  O16  1  0.742  0.258  0.156  1.0
  O  O17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.258  0.742  0.156  1.0
  O  O19  1  0.258  0.742  0.844  1.0
  O  O20  1  0.242  0.242  0.656  1.0
  O  O21  1  0.242  0.242  0.344  1.0
[/CIF]
.