The structure described by Rb5FeO4 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted RbO4 tetrahedra that share corners with four equivalent Fe(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra, and edges with four equivalent Rb(2)O4 tetrahedra. In the second Rb site, Rb(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted RbO4 tetrahedra that share corners with two equivalent Rb(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra,  an edgeedge with one Rb(1)O4 tetrahedra,  an edgeedge with one Fe(1)O4 tetrahedra, and edges with two equivalent Rb(2)O4 tetrahedra. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with four equivalent Rb(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra, and edges with four equivalent Rb(2)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), four equivalent Rb(2), and one Fe(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Rb(1), four equivalent Rb(2), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Rb5FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.658
_cell_length_b   8.064
_cell_length_c   8.851
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   475.197
_cell_formula_units_Z   2
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
  Fe  Fe0  1  0.208  0.250  0.750  1.0
  Fe  Fe1  1  0.792  0.750  0.250  1.0
  O  O2  1  0.047  0.250  0.936  1.0
  O  O3  1  0.047  0.250  0.564  1.0
  O  O4  1  0.953  0.750  0.436  1.0
  O  O5  1  0.953  0.750  0.064  1.0
  O  O6  1  0.367  0.046  0.750  1.0
  O  O7  1  0.367  0.454  0.750  1.0
  O  O8  1  0.633  0.954  0.250  1.0
  O  O9  1  0.633  0.546  0.250  1.0
  Rb  Rb10  1  0.148  0.750  0.750  1.0
  Rb  Rb11  1  0.852  0.250  0.250  1.0
  Rb  Rb12  1  0.738  0.011  0.941  1.0
  Rb  Rb13  1  0.738  0.489  0.941  1.0
  Rb  Rb14  1  0.738  0.011  0.559  1.0
  Rb  Rb15  1  0.738  0.489  0.559  1.0
  Rb  Rb16  1  0.262  0.989  0.441  1.0
  Rb  Rb17  1  0.262  0.511  0.441  1.0
  Rb  Rb18  1  0.262  0.989  0.059  1.0
  Rb  Rb19  1  0.262  0.511  0.059  1.0
[/CIF]
.
The structure described by Rb5FeO4 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted RbO4 tetrahedra that share corners with four equivalent Fe(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra, and edges with four equivalent Rb(2)O4 tetrahedra. In the second Rb site, Rb(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted RbO4 tetrahedra that share corners with two equivalent Rb(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra,  an edgeedge with one Rb(1)O4 tetrahedra,  an edgeedge with one Fe(1)O4 tetrahedra, and edges with two equivalent Rb(2)O4 tetrahedra. Fe(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form FeO4 tetrahedra that share corners with four equivalent Rb(1)O4 tetrahedra, corners with eight equivalent Rb(2)O4 tetrahedra, and edges with four equivalent Rb(2)O4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), four equivalent Rb(2), and one Fe(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Rb(1), four equivalent Rb(2), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Rb5FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.658
_cell_length_b   8.064
_cell_length_c   8.851
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   475.197
_cell_formula_units_Z   2
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
  Fe  Fe0  1  0.208  0.250  0.750  1.0
  Fe  Fe1  1  0.792  0.750  0.250  1.0
  O  O2  1  0.047  0.250  0.936  1.0
  O  O3  1  0.047  0.250  0.564  1.0
  O  O4  1  0.953  0.750  0.436  1.0
  O  O5  1  0.953  0.750  0.064  1.0
  O  O6  1  0.367  0.046  0.750  1.0
  O  O7  1  0.367  0.454  0.750  1.0
  O  O8  1  0.633  0.954  0.250  1.0
  O  O9  1  0.633  0.546  0.250  1.0
  Rb  Rb10  1  0.148  0.750  0.750  1.0
  Rb  Rb11  1  0.852  0.250  0.250  1.0
  Rb  Rb12  1  0.738  0.011  0.941  1.0
  Rb  Rb13  1  0.738  0.489  0.941  1.0
  Rb  Rb14  1  0.738  0.011  0.559  1.0
  Rb  Rb15  1  0.738  0.489  0.559  1.0
  Rb  Rb16  1  0.262  0.989  0.441  1.0
  Rb  Rb17  1  0.262  0.511  0.441  1.0
  Rb  Rb18  1  0.262  0.989  0.059  1.0
  Rb  Rb19  1  0.262  0.511  0.059  1.0
[/CIF]
.