The material described by K2Na4Co2O5 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 1-coordinate geometry to one O(3) and two equivalent O(1) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing NaO4 trigonal pyramids. Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent Na(1), two equivalent Na(2), and one Co(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Co(1) atom. In the third O site, O(3) is bonded in an octahedral geometry to two equivalent K(1), two equivalent Na(1), and two equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_K2Na4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.386
_cell_length_b   6.387
_cell_length_c   12.252
_cell_angle_alpha   58.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   426.887
_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  0.804  0.285  0.519  1.0
  K  K1  1  0.696  0.285  0.019  1.0
  K  K2  1  0.196  0.715  0.481  1.0
  K  K3  1  0.304  0.715  0.981  1.0
  Na  Na4  1  0.501  0.775  0.721  1.0
  Na  Na5  1  0.999  0.775  0.221  1.0
  Na  Na6  1  0.499  0.225  0.279  1.0
  Na  Na7  1  0.001  0.225  0.779  1.0
  Na  Na8  1  0.001  0.254  0.250  1.0
  Na  Na9  1  0.499  0.254  0.750  1.0
  Na  Na10  1  0.999  0.746  0.750  1.0
  Na  Na11  1  0.501  0.746  0.250  1.0
  Co  Co12  1  0.287  0.212  0.501  1.0
  Co  Co13  1  0.713  0.788  0.499  1.0
  Co  Co14  1  0.213  0.212  0.001  1.0
  Co  Co15  1  0.787  0.788  0.999  1.0
  O  O16  1  0.215  0.448  0.339  1.0
  O  O17  1  0.786  0.879  0.336  1.0
  O  O18  1  0.285  0.448  0.839  1.0
  O  O19  1  0.714  0.879  0.836  1.0
  O  O20  1  0.785  0.552  0.661  1.0
  O  O21  1  0.214  0.121  0.664  1.0
  O  O22  1  0.715  0.552  0.161  1.0
  O  O23  1  0.286  0.121  0.164  1.0
  O  O24  1  0.500  0.000  0.500  1.0
  O  O25  1  0.000  0.000  0.000  1.0
[/CIF]
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The material described by K2Na4Co2O5 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 1-coordinate geometry to one O(3) and two equivalent O(1) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing NaO4 trigonal pyramids. Co(1) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent Na(1), two equivalent Na(2), and one Co(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Co(1) atom. In the third O site, O(3) is bonded in an octahedral geometry to two equivalent K(1), two equivalent Na(1), and two equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_K2Na4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.386
_cell_length_b   6.387
_cell_length_c   12.252
_cell_angle_alpha   58.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   426.887
_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  0.804  0.285  0.519  1.0
  K  K1  1  0.696  0.285  0.019  1.0
  K  K2  1  0.196  0.715  0.481  1.0
  K  K3  1  0.304  0.715  0.981  1.0
  Na  Na4  1  0.501  0.775  0.721  1.0
  Na  Na5  1  0.999  0.775  0.221  1.0
  Na  Na6  1  0.499  0.225  0.279  1.0
  Na  Na7  1  0.001  0.225  0.779  1.0
  Na  Na8  1  0.001  0.254  0.250  1.0
  Na  Na9  1  0.499  0.254  0.750  1.0
  Na  Na10  1  0.999  0.746  0.750  1.0
  Na  Na11  1  0.501  0.746  0.250  1.0
  Co  Co12  1  0.287  0.212  0.501  1.0
  Co  Co13  1  0.713  0.788  0.499  1.0
  Co  Co14  1  0.213  0.212  0.001  1.0
  Co  Co15  1  0.787  0.788  0.999  1.0
  O  O16  1  0.215  0.448  0.339  1.0
  O  O17  1  0.786  0.879  0.336  1.0
  O  O18  1  0.285  0.448  0.839  1.0
  O  O19  1  0.714  0.879  0.836  1.0
  O  O20  1  0.785  0.552  0.661  1.0
  O  O21  1  0.214  0.121  0.664  1.0
  O  O22  1  0.715  0.552  0.161  1.0
  O  O23  1  0.286  0.121  0.164  1.0
  O  O24  1  0.500  0.000  0.500  1.0
  O  O25  1  0.000  0.000  0.000  1.0
[/CIF]
.