The structure described by Rb3FeO3 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 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. Fe(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form edge-sharing FeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Fe(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3FeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.821
_cell_length_b   7.640
_cell_length_c   10.949
_cell_angle_alpha   84.845
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   568.288
_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  0.319  0.361  0.070  1.0
  Rb  Rb1  1  0.622  0.955  0.152  1.0
  Rb  Rb2  1  0.814  0.363  0.197  1.0
  Rb  Rb3  1  0.314  0.637  0.303  1.0
  Rb  Rb4  1  0.122  0.045  0.348  1.0
  Rb  Rb5  1  0.819  0.639  0.430  1.0
  Rb  Rb6  1  0.181  0.361  0.570  1.0
  Rb  Rb7  1  0.878  0.955  0.652  1.0
  Rb  Rb8  1  0.686  0.363  0.697  1.0
  Rb  Rb9  1  0.186  0.637  0.803  1.0
  Rb  Rb10  1  0.378  0.045  0.848  1.0
  Rb  Rb11  1  0.681  0.639  0.930  1.0
  Fe  Fe12  1  0.079  0.846  0.064  1.0
  Fe  Fe13  1  0.579  0.154  0.436  1.0
  Fe  Fe14  1  0.421  0.846  0.564  1.0
  Fe  Fe15  1  0.921  0.154  0.936  1.0
  O  O16  1  0.329  0.756  0.039  1.0
  O  O17  1  0.053  0.096  0.094  1.0
  O  O18  1  0.938  0.705  0.178  1.0
  O  O19  1  0.438  0.295  0.322  1.0
  O  O20  1  0.553  0.904  0.406  1.0
  O  O21  1  0.829  0.244  0.461  1.0
  O  O22  1  0.171  0.756  0.539  1.0
  O  O23  1  0.447  0.096  0.594  1.0
  O  O24  1  0.562  0.705  0.678  1.0
  O  O25  1  0.062  0.295  0.822  1.0
  O  O26  1  0.947  0.904  0.906  1.0
  O  O27  1  0.671  0.244  0.961  1.0
[/CIF]
.
The structure described by Rb3FeO3 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 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. Fe(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form edge-sharing FeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Fe(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), two equivalent Rb(2), and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), two equivalent Rb(1), two equivalent Rb(3), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3FeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.821
_cell_length_b   7.640
_cell_length_c   10.949
_cell_angle_alpha   84.845
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   568.288
_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  0.319  0.361  0.070  1.0
  Rb  Rb1  1  0.622  0.955  0.152  1.0
  Rb  Rb2  1  0.814  0.363  0.197  1.0
  Rb  Rb3  1  0.314  0.637  0.303  1.0
  Rb  Rb4  1  0.122  0.045  0.348  1.0
  Rb  Rb5  1  0.819  0.639  0.430  1.0
  Rb  Rb6  1  0.181  0.361  0.570  1.0
  Rb  Rb7  1  0.878  0.955  0.652  1.0
  Rb  Rb8  1  0.686  0.363  0.697  1.0
  Rb  Rb9  1  0.186  0.637  0.803  1.0
  Rb  Rb10  1  0.378  0.045  0.848  1.0
  Rb  Rb11  1  0.681  0.639  0.930  1.0
  Fe  Fe12  1  0.079  0.846  0.064  1.0
  Fe  Fe13  1  0.579  0.154  0.436  1.0
  Fe  Fe14  1  0.421  0.846  0.564  1.0
  Fe  Fe15  1  0.921  0.154  0.936  1.0
  O  O16  1  0.329  0.756  0.039  1.0
  O  O17  1  0.053  0.096  0.094  1.0
  O  O18  1  0.938  0.705  0.178  1.0
  O  O19  1  0.438  0.295  0.322  1.0
  O  O20  1  0.553  0.904  0.406  1.0
  O  O21  1  0.829  0.244  0.461  1.0
  O  O22  1  0.171  0.756  0.539  1.0
  O  O23  1  0.447  0.096  0.594  1.0
  O  O24  1  0.562  0.705  0.678  1.0
  O  O25  1  0.062  0.295  0.822  1.0
  O  O26  1  0.947  0.904  0.906  1.0
  O  O27  1  0.671  0.244  0.961  1.0
[/CIF]
.