The structure described by Rb2Na4Co2O5 crystallizes in the tetragonal P4_2/mnm space group. Rb(1) is bonded in a distorted single-bond geometry to one O(1) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent O(2) atoms to form distorted corner-sharing NaO4 trigonal pyramids. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. Co(1) is bonded in a distorted 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 an octahedral geometry to two equivalent Rb(1), two equivalent Na(2), and two equivalent Co(1) atoms. 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. is represented by the CIF card [CIF]
data_Rb2Na4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.527
_cell_length_b   6.527
_cell_length_c   10.346
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   440.733
_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
  Rb  Rb0  1  0.304  0.304  0.000  1.0
  Rb  Rb1  1  0.196  0.804  0.500  1.0
  Rb  Rb2  1  0.804  0.196  0.500  1.0
  Rb  Rb3  1  0.696  0.696  0.000  1.0
  Na  Na4  1  0.000  0.500  0.750  1.0
  Na  Na5  1  0.500  0.000  0.750  1.0
  Na  Na6  1  0.000  0.000  0.777  1.0
  Na  Na7  1  0.500  0.000  0.250  1.0
  Na  Na8  1  0.500  0.500  0.277  1.0
  Na  Na9  1  0.500  0.500  0.723  1.0
  Na  Na10  1  0.000  0.000  0.223  1.0
  Na  Na11  1  0.000  0.500  0.250  1.0
  Co  Co12  1  0.710  0.710  0.500  1.0
  Co  Co13  1  0.790  0.210  0.000  1.0
  Co  Co14  1  0.210  0.790  0.000  1.0
  Co  Co15  1  0.290  0.290  0.500  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.000  0.000  0.000  1.0
  O  O18  1  0.718  0.282  0.836  1.0
  O  O19  1  0.282  0.718  0.836  1.0
  O  O20  1  0.218  0.218  0.336  1.0
  O  O21  1  0.782  0.782  0.664  1.0
  O  O22  1  0.218  0.218  0.664  1.0
  O  O23  1  0.718  0.282  0.164  1.0
  O  O24  1  0.782  0.782  0.336  1.0
  O  O25  1  0.282  0.718  0.164  1.0
[/CIF]
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The structure described by Rb2Na4Co2O5 crystallizes in the tetragonal P4_2/mnm space group. Rb(1) is bonded in a distorted single-bond geometry to one O(1) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent O(2) atoms to form distorted corner-sharing NaO4 trigonal pyramids. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. Co(1) is bonded in a distorted 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 an octahedral geometry to two equivalent Rb(1), two equivalent Na(2), and two equivalent Co(1) atoms. 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. is represented by the CIF card [CIF]
data_Rb2Na4Co2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.527
_cell_length_b   6.527
_cell_length_c   10.346
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   440.733
_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
  Rb  Rb0  1  0.304  0.304  0.000  1.0
  Rb  Rb1  1  0.196  0.804  0.500  1.0
  Rb  Rb2  1  0.804  0.196  0.500  1.0
  Rb  Rb3  1  0.696  0.696  0.000  1.0
  Na  Na4  1  0.000  0.500  0.750  1.0
  Na  Na5  1  0.500  0.000  0.750  1.0
  Na  Na6  1  0.000  0.000  0.777  1.0
  Na  Na7  1  0.500  0.000  0.250  1.0
  Na  Na8  1  0.500  0.500  0.277  1.0
  Na  Na9  1  0.500  0.500  0.723  1.0
  Na  Na10  1  0.000  0.000  0.223  1.0
  Na  Na11  1  0.000  0.500  0.250  1.0
  Co  Co12  1  0.710  0.710  0.500  1.0
  Co  Co13  1  0.790  0.210  0.000  1.0
  Co  Co14  1  0.210  0.790  0.000  1.0
  Co  Co15  1  0.290  0.290  0.500  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.000  0.000  0.000  1.0
  O  O18  1  0.718  0.282  0.836  1.0
  O  O19  1  0.282  0.718  0.836  1.0
  O  O20  1  0.218  0.218  0.336  1.0
  O  O21  1  0.782  0.782  0.664  1.0
  O  O22  1  0.218  0.218  0.664  1.0
  O  O23  1  0.718  0.282  0.164  1.0
  O  O24  1  0.782  0.782  0.336  1.0
  O  O25  1  0.282  0.718  0.164  1.0
[/CIF]
.