The crystal structure described by Rb3Cu5O4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form distorted edge-sharing RbO4 trigonal pyramids. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(4) atoms. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(1) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(2) and one O(4) atom. In the third Cu site, Cu(3) is bonded in a linear geometry to one O(2) and one O(3) atom. In the fourth Cu site, Cu(4) is bonded in a linear geometry to one O(1) and one O(3) atom. In the fifth Cu site, Cu(5) is bonded in a linear geometry to one O(2) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(3), two equivalent Rb(1), one Cu(1), and one Cu(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(2), one Rb(3), one Cu(2), one Cu(3), and one Cu(5) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(2), one Cu(1), one Cu(3), and one Cu(4) atom to form distorted corner-sharing ORb2Cu3 square pyramids. The corner-sharing octahedral tilt angles range from 19-72°. In the fourth O site, O(4) is bonded to one Rb(1), one Rb(2), two equivalent Rb(3), one Cu(2), and one Cu(5) atom to form distorted ORb4Cu2 octahedra that share corners with two equivalent O(3)Rb2Cu3 square pyramids and  an edgeedge with one O(4)Rb4Cu2 octahedra. is represented by the CIF file [CIF]
data_Rb3Cu5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.347
_cell_length_b   9.853
_cell_length_c   14.329
_cell_angle_alpha   73.283
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   993.486
_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  0.835  0.398  0.093  1.0
  Rb  Rb1  1  0.335  0.602  0.407  1.0
  Rb  Rb2  1  0.165  0.602  0.907  1.0
  Rb  Rb3  1  0.665  0.398  0.593  1.0
  Rb  Rb4  1  0.215  0.229  0.581  1.0
  Rb  Rb5  1  0.715  0.771  0.919  1.0
  Rb  Rb6  1  0.785  0.771  0.419  1.0
  Rb  Rb7  1  0.285  0.229  0.081  1.0
  Rb  Rb8  1  0.914  0.176  0.894  1.0
  Rb  Rb9  1  0.414  0.824  0.606  1.0
  Rb  Rb10  1  0.086  0.824  0.106  1.0
  Rb  Rb11  1  0.586  0.176  0.394  1.0
  Cu  Cu12  1  0.581  0.434  0.878  1.0
  Cu  Cu13  1  0.199  0.961  0.379  1.0
  Cu  Cu14  1  0.801  0.039  0.621  1.0
  Cu  Cu15  1  0.301  0.961  0.879  1.0
  Cu  Cu16  1  0.058  0.201  0.364  1.0
  Cu  Cu17  1  0.558  0.799  0.136  1.0
  Cu  Cu18  1  0.942  0.799  0.636  1.0
  Cu  Cu19  1  0.442  0.201  0.864  1.0
  Cu  Cu20  1  0.172  0.438  0.242  1.0
  Cu  Cu21  1  0.672  0.562  0.258  1.0
  Cu  Cu22  1  0.828  0.562  0.758  1.0
  Cu  Cu23  1  0.328  0.438  0.742  1.0
  Cu  Cu24  1  0.951  0.067  0.234  1.0
  Cu  Cu25  1  0.451  0.933  0.266  1.0
  Cu  Cu26  1  0.049  0.933  0.766  1.0
  Cu  Cu27  1  0.549  0.067  0.734  1.0
  Cu  Cu28  1  0.419  0.566  0.122  1.0
  Cu  Cu29  1  0.919  0.434  0.378  1.0
  Cu  Cu30  1  0.699  0.039  0.121  1.0
  Cu  Cu31  1  0.081  0.566  0.622  1.0
  O  O32  1  0.810  0.494  0.889  1.0
  O  O33  1  0.310  0.506  0.611  1.0
  O  O34  1  0.190  0.506  0.111  1.0
  O  O35  1  0.690  0.494  0.389  1.0
  O  O36  1  0.536  0.029  0.866  1.0
  O  O37  1  0.036  0.971  0.634  1.0
  O  O38  1  0.464  0.971  0.134  1.0
  O  O39  1  0.964  0.029  0.366  1.0
  O  O40  1  0.653  0.632  0.124  1.0
  O  O41  1  0.153  0.368  0.376  1.0
  O  O42  1  0.347  0.368  0.876  1.0
  O  O43  1  0.847  0.632  0.624  1.0
  O  O44  1  0.930  0.106  0.102  1.0
  O  O45  1  0.430  0.894  0.398  1.0
  O  O46  1  0.070  0.894  0.898  1.0
  O  O47  1  0.570  0.106  0.602  1.0
[/CIF]
.
The crystal structure described by Rb3Cu5O4 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form distorted edge-sharing RbO4 trigonal pyramids. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(4) atoms. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(1) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a linear geometry to one O(2) and one O(4) atom. In the third Cu site, Cu(3) is bonded in a linear geometry to one O(2) and one O(3) atom. In the fourth Cu site, Cu(4) is bonded in a linear geometry to one O(1) and one O(3) atom. In the fifth Cu site, Cu(5) is bonded in a linear geometry to one O(2) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(2), one Rb(3), two equivalent Rb(1), one Cu(1), and one Cu(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(2), one Rb(3), one Cu(2), one Cu(3), and one Cu(5) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(2), one Cu(1), one Cu(3), and one Cu(4) atom to form distorted corner-sharing ORb2Cu3 square pyramids. The corner-sharing octahedral tilt angles range from 19-72°. In the fourth O site, O(4) is bonded to one Rb(1), one Rb(2), two equivalent Rb(3), one Cu(2), and one Cu(5) atom to form distorted ORb4Cu2 octahedra that share corners with two equivalent O(3)Rb2Cu3 square pyramids and  an edgeedge with one O(4)Rb4Cu2 octahedra. is represented by the CIF file [CIF]
data_Rb3Cu5O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.347
_cell_length_b   9.853
_cell_length_c   14.329
_cell_angle_alpha   73.283
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   993.486
_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  0.835  0.398  0.093  1.0
  Rb  Rb1  1  0.335  0.602  0.407  1.0
  Rb  Rb2  1  0.165  0.602  0.907  1.0
  Rb  Rb3  1  0.665  0.398  0.593  1.0
  Rb  Rb4  1  0.215  0.229  0.581  1.0
  Rb  Rb5  1  0.715  0.771  0.919  1.0
  Rb  Rb6  1  0.785  0.771  0.419  1.0
  Rb  Rb7  1  0.285  0.229  0.081  1.0
  Rb  Rb8  1  0.914  0.176  0.894  1.0
  Rb  Rb9  1  0.414  0.824  0.606  1.0
  Rb  Rb10  1  0.086  0.824  0.106  1.0
  Rb  Rb11  1  0.586  0.176  0.394  1.0
  Cu  Cu12  1  0.581  0.434  0.878  1.0
  Cu  Cu13  1  0.199  0.961  0.379  1.0
  Cu  Cu14  1  0.801  0.039  0.621  1.0
  Cu  Cu15  1  0.301  0.961  0.879  1.0
  Cu  Cu16  1  0.058  0.201  0.364  1.0
  Cu  Cu17  1  0.558  0.799  0.136  1.0
  Cu  Cu18  1  0.942  0.799  0.636  1.0
  Cu  Cu19  1  0.442  0.201  0.864  1.0
  Cu  Cu20  1  0.172  0.438  0.242  1.0
  Cu  Cu21  1  0.672  0.562  0.258  1.0
  Cu  Cu22  1  0.828  0.562  0.758  1.0
  Cu  Cu23  1  0.328  0.438  0.742  1.0
  Cu  Cu24  1  0.951  0.067  0.234  1.0
  Cu  Cu25  1  0.451  0.933  0.266  1.0
  Cu  Cu26  1  0.049  0.933  0.766  1.0
  Cu  Cu27  1  0.549  0.067  0.734  1.0
  Cu  Cu28  1  0.419  0.566  0.122  1.0
  Cu  Cu29  1  0.919  0.434  0.378  1.0
  Cu  Cu30  1  0.699  0.039  0.121  1.0
  Cu  Cu31  1  0.081  0.566  0.622  1.0
  O  O32  1  0.810  0.494  0.889  1.0
  O  O33  1  0.310  0.506  0.611  1.0
  O  O34  1  0.190  0.506  0.111  1.0
  O  O35  1  0.690  0.494  0.389  1.0
  O  O36  1  0.536  0.029  0.866  1.0
  O  O37  1  0.036  0.971  0.634  1.0
  O  O38  1  0.464  0.971  0.134  1.0
  O  O39  1  0.964  0.029  0.366  1.0
  O  O40  1  0.653  0.632  0.124  1.0
  O  O41  1  0.153  0.368  0.376  1.0
  O  O42  1  0.347  0.368  0.876  1.0
  O  O43  1  0.847  0.632  0.624  1.0
  O  O44  1  0.930  0.106  0.102  1.0
  O  O45  1  0.430  0.894  0.398  1.0
  O  O46  1  0.070  0.894  0.898  1.0
  O  O47  1  0.570  0.106  0.602  1.0
[/CIF]
.