The structure described by Rb2CoO3 crystallizes in the monoclinic Cm space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Rb site, Rb(4) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(6), and two equivalent O(7) atoms. In the second Co site, Co(2) is bonded to one O(4), two equivalent O(5), and two equivalent O(7) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the third Co site, Co(3) is bonded to one O(1), two equivalent O(5), and two equivalent O(8) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the fourth Co site, Co(4) is bonded to one O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Co(3) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(4), and one Co(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(3), two equivalent Rb(4), and one Co(4) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Rb(2), two equivalent Rb(3), two equivalent Rb(4), and one Co(2) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(2), and one Co(3) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(1), and one Co(4) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(1), and one Co(2) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(3), and one Co(4) atom. is represented by the CIF card [CIF]
data_Rb2CoO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   6.372
_cell_length_c   6.372
_cell_angle_alpha   70.959
_cell_angle_beta   90.061
_cell_angle_gamma   89.936
_symmetry_Int_Tables_number   1
_cell_volume   207.731
_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
  Co  Co0  1  0.236  0.923  0.077  1.0
  Co  Co1  1  0.738  0.074  0.926  1.0
  O  O2  1  0.231  0.681  0.319  1.0
  O  O3  1  0.733  0.317  0.683  1.0
  O  O4  1  0.989  0.122  0.114  1.0
  O  O5  1  0.493  0.117  0.120  1.0
  O  O6  1  0.989  0.886  0.878  1.0
  O  O7  1  0.493  0.880  0.883  1.0
  Rb  Rb8  1  0.744  0.495  0.183  1.0
  Rb  Rb9  1  0.245  0.183  0.496  1.0
  Rb  Rb10  1  0.744  0.817  0.505  1.0
  Rb  Rb11  1  0.245  0.504  0.817  1.0
[/CIF]
.
The structure described by Rb2CoO3 crystallizes in the monoclinic Cm space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the third Rb site, Rb(3) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Rb site, Rb(4) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(6), and two equivalent O(7) atoms. In the second Co site, Co(2) is bonded to one O(4), two equivalent O(5), and two equivalent O(7) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the third Co site, Co(3) is bonded to one O(1), two equivalent O(5), and two equivalent O(8) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. In the fourth Co site, Co(4) is bonded to one O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted edge-sharing CoO5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Co(3) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(4), and one Co(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(3), two equivalent Rb(4), and one Co(4) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Rb(2), two equivalent Rb(3), two equivalent Rb(4), and one Co(2) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(2), and one Co(3) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(1), and one Co(4) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(1), and one Co(2) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one Co(3), and one Co(4) atom. is represented by the CIF card [CIF]
data_Rb2CoO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   6.372
_cell_length_c   6.372
_cell_angle_alpha   70.959
_cell_angle_beta   90.061
_cell_angle_gamma   89.936
_symmetry_Int_Tables_number   1
_cell_volume   207.731
_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
  Co  Co0  1  0.236  0.923  0.077  1.0
  Co  Co1  1  0.738  0.074  0.926  1.0
  O  O2  1  0.231  0.681  0.319  1.0
  O  O3  1  0.733  0.317  0.683  1.0
  O  O4  1  0.989  0.122  0.114  1.0
  O  O5  1  0.493  0.117  0.120  1.0
  O  O6  1  0.989  0.886  0.878  1.0
  O  O7  1  0.493  0.880  0.883  1.0
  Rb  Rb8  1  0.744  0.495  0.183  1.0
  Rb  Rb9  1  0.245  0.183  0.496  1.0
  Rb  Rb10  1  0.744  0.817  0.505  1.0
  Rb  Rb11  1  0.245  0.504  0.817  1.0
[/CIF]
.