The crystal structure described by RbNa2NiO2 crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to four equivalent Ni(1) and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing RbNi4O2 octahedra. The corner-sharing octahedra are not tilted. Na(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. Ni(1) is bonded in a linear geometry to four equivalent Rb(1) and two equivalent O(1) atoms. O(1) is bonded in a 5-coordinate geometry to one Rb(1), four equivalent Na(1), and one Ni(1) atom. is represented by the CIF file [CIF]
data_RbNa2NiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.863
_cell_length_b   5.863
_cell_length_c   5.863
_cell_angle_alpha   133.302
_cell_angle_beta   133.302
_cell_angle_gamma   68.181
_symmetry_Int_Tables_number   1
_cell_volume   104.858
_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  0.000  1.0
  Na  Na1  1  0.250  0.750  0.500  1.0
  Na  Na2  1  0.750  0.250  0.500  1.0
  Ni  Ni3  1  0.500  0.500  0.000  1.0
  O  O4  1  0.683  0.683  0.000  1.0
  O  O5  1  0.317  0.317  0.000  1.0
[/CIF]
.
The crystal structure described by RbNa2NiO2 crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to four equivalent Ni(1) and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing RbNi4O2 octahedra. The corner-sharing octahedra are not tilted. Na(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. Ni(1) is bonded in a linear geometry to four equivalent Rb(1) and two equivalent O(1) atoms. O(1) is bonded in a 5-coordinate geometry to one Rb(1), four equivalent Na(1), and one Ni(1) atom. is represented by the CIF file [CIF]
data_RbNa2NiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.863
_cell_length_b   5.863
_cell_length_c   5.863
_cell_angle_alpha   133.302
_cell_angle_beta   133.302
_cell_angle_gamma   68.181
_symmetry_Int_Tables_number   1
_cell_volume   104.858
_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  0.000  1.0
  Na  Na1  1  0.250  0.750  0.500  1.0
  Na  Na2  1  0.750  0.250  0.500  1.0
  Ni  Ni3  1  0.500  0.500  0.000  1.0
  O  O4  1  0.683  0.683  0.000  1.0
  O  O5  1  0.317  0.317  0.000  1.0
[/CIF]
.