The structure described by Rb3CuO2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing RbO4 tetrahedra. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Cu(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Cu(1) atom. is represented by the CIF card [CIF]
data_Rb3CuO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.673
_cell_length_b   6.728
_cell_length_c   9.409
_cell_angle_alpha   68.050
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   567.927
_cell_formula_units_Z   4
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  0.966  0.754  0.505  1.0
  Rb  Rb1  1  0.466  0.246  0.995  1.0
  Rb  Rb2  1  0.034  0.246  0.495  1.0
  Rb  Rb3  1  0.534  0.754  0.005  1.0
  Rb  Rb4  1  0.524  0.737  0.625  1.0
  Rb  Rb5  1  0.024  0.263  0.875  1.0
  Rb  Rb6  1  0.476  0.263  0.375  1.0
  Rb  Rb7  1  0.976  0.737  0.125  1.0
  Rb  Rb8  1  0.791  0.241  0.187  1.0
  Rb  Rb9  1  0.291  0.759  0.313  1.0
  Rb  Rb10  1  0.209  0.759  0.813  1.0
  Rb  Rb11  1  0.709  0.241  0.687  1.0
  Cu  Cu12  1  0.821  0.709  0.828  1.0
  Cu  Cu13  1  0.321  0.291  0.672  1.0
  Cu  Cu14  1  0.179  0.291  0.172  1.0
  Cu  Cu15  1  0.679  0.709  0.328  1.0
  O  O16  1  0.801  0.492  0.379  1.0
  O  O17  1  0.301  0.508  0.121  1.0
  O  O18  1  0.199  0.508  0.621  1.0
  O  O19  1  0.699  0.492  0.879  1.0
  O  O20  1  0.439  0.069  0.722  1.0
  O  O21  1  0.061  0.069  0.222  1.0
  O  O22  1  0.939  0.931  0.778  1.0
  O  O23  1  0.561  0.931  0.278  1.0
[/CIF]
.
The structure described by Rb3CuO2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing RbO4 tetrahedra. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Cu(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Cu(1) atom. is represented by the CIF card [CIF]
data_Rb3CuO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.673
_cell_length_b   6.728
_cell_length_c   9.409
_cell_angle_alpha   68.050
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   567.927
_cell_formula_units_Z   4
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  0.966  0.754  0.505  1.0
  Rb  Rb1  1  0.466  0.246  0.995  1.0
  Rb  Rb2  1  0.034  0.246  0.495  1.0
  Rb  Rb3  1  0.534  0.754  0.005  1.0
  Rb  Rb4  1  0.524  0.737  0.625  1.0
  Rb  Rb5  1  0.024  0.263  0.875  1.0
  Rb  Rb6  1  0.476  0.263  0.375  1.0
  Rb  Rb7  1  0.976  0.737  0.125  1.0
  Rb  Rb8  1  0.791  0.241  0.187  1.0
  Rb  Rb9  1  0.291  0.759  0.313  1.0
  Rb  Rb10  1  0.209  0.759  0.813  1.0
  Rb  Rb11  1  0.709  0.241  0.687  1.0
  Cu  Cu12  1  0.821  0.709  0.828  1.0
  Cu  Cu13  1  0.321  0.291  0.672  1.0
  Cu  Cu14  1  0.179  0.291  0.172  1.0
  Cu  Cu15  1  0.679  0.709  0.328  1.0
  O  O16  1  0.801  0.492  0.379  1.0
  O  O17  1  0.301  0.508  0.121  1.0
  O  O18  1  0.199  0.508  0.621  1.0
  O  O19  1  0.699  0.492  0.879  1.0
  O  O20  1  0.439  0.069  0.722  1.0
  O  O21  1  0.061  0.069  0.222  1.0
  O  O22  1  0.939  0.931  0.778  1.0
  O  O23  1  0.561  0.931  0.278  1.0
[/CIF]
.