The compound described by RbNa7(CoO3)2 crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded to one O(1) and three equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing NaO4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1) and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing NaO4 tetrahedra. In the fourth Na site, Na(4) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. 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 6-coordinate geometry to one Na(2), one Na(3), one Na(4), two equivalent Na(1), and one Co(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(4), three equivalent Na(3), and one Co(1) atom to form a mixture of corner and edge-sharing ONa5Co octahedra. The corner-sharing octahedral tilt angles range from 0-31°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Na(1), three equivalent Na(2), and one Co(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbNa7(CoO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   5.875
_cell_length_c   10.814
_cell_angle_alpha   88.755
_cell_angle_beta   88.755
_cell_angle_gamma   44.360
_symmetry_Int_Tables_number   1
_cell_volume   260.914
_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
  Rb  Rb0  1  0.000  0.000  0.500  1.0
  Na  Na1  1  0.856  0.856  0.221  1.0
  Na  Na2  1  0.727  0.727  0.605  1.0
  Na  Na3  1  0.232  0.232  0.094  1.0
  Na  Na4  1  0.273  0.273  0.395  1.0
  Na  Na5  1  0.144  0.144  0.779  1.0
  Na  Na6  1  0.768  0.768  0.906  1.0
  Na  Na7  1  0.500  0.500  0.000  1.0
  Co  Co8  1  0.584  0.584  0.260  1.0
  Co  Co9  1  0.416  0.416  0.740  1.0
  O  O10  1  0.583  0.583  0.770  1.0
  O  O11  1  0.677  0.677  0.106  1.0
  O  O12  1  0.323  0.323  0.894  1.0
  O  O13  1  0.686  0.686  0.394  1.0
  O  O14  1  0.417  0.417  0.230  1.0
  O  O15  1  0.314  0.314  0.606  1.0
[/CIF]
.
The compound described by RbNa7(CoO3)2 crystallizes in the monoclinic C2/m space group. Rb(1) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded to one O(1) and three equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing NaO4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1) and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing NaO4 tetrahedra. In the fourth Na site, Na(4) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. 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 6-coordinate geometry to one Na(2), one Na(3), one Na(4), two equivalent Na(1), and one Co(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(4), three equivalent Na(3), and one Co(1) atom to form a mixture of corner and edge-sharing ONa5Co octahedra. The corner-sharing octahedral tilt angles range from 0-31°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Rb(1), one Na(1), three equivalent Na(2), and one Co(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbNa7(CoO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.875
_cell_length_b   5.875
_cell_length_c   10.814
_cell_angle_alpha   88.755
_cell_angle_beta   88.755
_cell_angle_gamma   44.360
_symmetry_Int_Tables_number   1
_cell_volume   260.914
_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
  Rb  Rb0  1  0.000  0.000  0.500  1.0
  Na  Na1  1  0.856  0.856  0.221  1.0
  Na  Na2  1  0.727  0.727  0.605  1.0
  Na  Na3  1  0.232  0.232  0.094  1.0
  Na  Na4  1  0.273  0.273  0.395  1.0
  Na  Na5  1  0.144  0.144  0.779  1.0
  Na  Na6  1  0.768  0.768  0.906  1.0
  Na  Na7  1  0.500  0.500  0.000  1.0
  Co  Co8  1  0.584  0.584  0.260  1.0
  Co  Co9  1  0.416  0.416  0.740  1.0
  O  O10  1  0.583  0.583  0.770  1.0
  O  O11  1  0.677  0.677  0.106  1.0
  O  O12  1  0.323  0.323  0.894  1.0
  O  O13  1  0.686  0.686  0.394  1.0
  O  O14  1  0.417  0.417  0.230  1.0
  O  O15  1  0.314  0.314  0.606  1.0
[/CIF]
.