The crystal structure described by Rb17Fe5O16 crystallizes in the monoclinic Cm space group. There are nine inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one O(8), and one O(9) atom. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(5) atoms. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one O(2), one O(6), one O(7), and one O(8) atom. In the fifth Rb site, Rb(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom. In the sixth Rb site, Rb(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and one O(8) atom. In the seventh Rb site, Rb(7) is bonded in a 4-coordinate geometry to one O(1), one O(4), and two equivalent O(5) atoms. In the eighth Rb site, Rb(8) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one O(8), and one O(9) atom. In the ninth Rb site, Rb(9) is bonded in a 4-coordinate geometry to one O(3), one O(9), and two equivalent O(6) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(9), and two equivalent O(6) atoms to form corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(2), one O(6), one O(7), and one O(8) atom to form corner-sharing FeO4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form corner-sharing FeO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(5), one Rb(6), one Rb(7), two equivalent Rb(3), and one Fe(3) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(5), one Rb(6), one Rb(8), and one Fe(2) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(9), two equivalent Rb(2), two equivalent Rb(8), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), one Rb(6), one Rb(7), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Rb(5), two equivalent Rb(3), two equivalent Rb(7), and one Fe(3) atom. In the sixth O site, O(6) is bonded to one Rb(2), one Rb(4), one Rb(8), one Rb(9), one Fe(1), and one Fe(2) atom to form distorted edge-sharing ORb4Fe2 octahedra. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one Rb(6), one Fe(2), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(5), one Rb(6), one Rb(8), and one Fe(2) atom. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Rb(9), two equivalent Rb(2), two equivalent Rb(8), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Rb17Fe5O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   18.796
_cell_length_b   18.796
_cell_length_c   7.009
_cell_angle_alpha   84.759
_cell_angle_beta   84.759
_cell_angle_gamma   158.609
_symmetry_Int_Tables_number   1
_cell_volume   786.099
_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  0.404  0.683  0.055  1.0
  Rb  Rb1  1  0.492  0.585  0.072  1.0
  Rb  Rb2  1  0.315  0.784  0.070  1.0
  Rb  Rb3  1  0.079  0.913  0.195  1.0
  Rb  Rb4  1  0.167  0.835  0.465  1.0
  Rb  Rb5  1  0.318  0.592  0.600  1.0
  Rb  Rb6  1  0.219  0.671  0.610  1.0
  Rb  Rb7  1  0.412  0.503  0.612  1.0
  Rb  Rb8  1  0.683  0.404  0.055  1.0
  Rb  Rb9  1  0.585  0.492  0.072  1.0
  Rb  Rb10  1  0.784  0.315  0.070  1.0
  Rb  Rb11  1  0.913  0.079  0.195  1.0
  Rb  Rb12  1  0.835  0.167  0.465  1.0
  Rb  Rb13  1  0.592  0.318  0.600  1.0
  Rb  Rb14  1  0.671  0.219  0.610  1.0
  Rb  Rb15  1  0.503  0.412  0.612  1.0
  Rb  Rb16  1  0.001  0.001  0.487  1.0
  Fe  Fe17  1  0.998  0.998  0.989  1.0
  Fe  Fe18  1  0.086  0.909  0.691  1.0
  Fe  Fe19  1  0.176  0.820  0.983  1.0
  Fe  Fe20  1  0.909  0.086  0.691  1.0
  Fe  Fe21  1  0.820  0.176  0.983  1.0
  O  O22  1  0.071  0.443  0.999  1.0
  O  O23  1  0.160  0.343  0.417  1.0
  O  O24  1  0.443  0.071  0.999  1.0
  O  O25  1  0.255  0.255  0.009  1.0
  O  O26  1  0.557  0.926  0.256  1.0
  O  O27  1  0.206  0.783  0.781  1.0
  O  O28  1  0.041  0.955  0.829  1.0
  O  O29  1  0.129  0.873  0.873  1.0
  O  O30  1  0.343  0.160  0.417  1.0
  O  O31  1  0.650  0.833  0.671  1.0
  O  O32  1  0.926  0.557  0.256  1.0
  O  O33  1  0.743  0.743  0.263  1.0
  O  O34  1  0.783  0.206  0.781  1.0
  O  O35  1  0.955  0.041  0.829  1.0
  O  O36  1  0.873  0.129  0.873  1.0
  O  O37  1  0.833  0.650  0.671  1.0
[/CIF]
.
The crystal structure described by Rb17Fe5O16 crystallizes in the monoclinic Cm space group. There are nine inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one O(8), and one O(9) atom. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(5) atoms. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one O(2), one O(6), one O(7), and one O(8) atom. In the fifth Rb site, Rb(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom. In the sixth Rb site, Rb(6) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and one O(8) atom. In the seventh Rb site, Rb(7) is bonded in a 4-coordinate geometry to one O(1), one O(4), and two equivalent O(5) atoms. In the eighth Rb site, Rb(8) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one O(8), and one O(9) atom. In the ninth Rb site, Rb(9) is bonded in a 4-coordinate geometry to one O(3), one O(9), and two equivalent O(6) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(9), and two equivalent O(6) atoms to form corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(2), one O(6), one O(7), and one O(8) atom to form corner-sharing FeO4 tetrahedra. In the third Fe site, Fe(3) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form corner-sharing FeO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(5), one Rb(6), one Rb(7), two equivalent Rb(3), and one Fe(3) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(5), one Rb(6), one Rb(8), and one Fe(2) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(9), two equivalent Rb(2), two equivalent Rb(8), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(3), one Rb(5), one Rb(6), one Rb(7), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Rb(5), two equivalent Rb(3), two equivalent Rb(7), and one Fe(3) atom. In the sixth O site, O(6) is bonded to one Rb(2), one Rb(4), one Rb(8), one Rb(9), one Fe(1), and one Fe(2) atom to form distorted edge-sharing ORb4Fe2 octahedra. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one Rb(6), one Fe(2), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Rb(5), one Rb(6), one Rb(8), and one Fe(2) atom. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Rb(9), two equivalent Rb(2), two equivalent Rb(8), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Rb17Fe5O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   18.796
_cell_length_b   18.796
_cell_length_c   7.009
_cell_angle_alpha   84.759
_cell_angle_beta   84.759
_cell_angle_gamma   158.609
_symmetry_Int_Tables_number   1
_cell_volume   786.099
_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  0.404  0.683  0.055  1.0
  Rb  Rb1  1  0.492  0.585  0.072  1.0
  Rb  Rb2  1  0.315  0.784  0.070  1.0
  Rb  Rb3  1  0.079  0.913  0.195  1.0
  Rb  Rb4  1  0.167  0.835  0.465  1.0
  Rb  Rb5  1  0.318  0.592  0.600  1.0
  Rb  Rb6  1  0.219  0.671  0.610  1.0
  Rb  Rb7  1  0.412  0.503  0.612  1.0
  Rb  Rb8  1  0.683  0.404  0.055  1.0
  Rb  Rb9  1  0.585  0.492  0.072  1.0
  Rb  Rb10  1  0.784  0.315  0.070  1.0
  Rb  Rb11  1  0.913  0.079  0.195  1.0
  Rb  Rb12  1  0.835  0.167  0.465  1.0
  Rb  Rb13  1  0.592  0.318  0.600  1.0
  Rb  Rb14  1  0.671  0.219  0.610  1.0
  Rb  Rb15  1  0.503  0.412  0.612  1.0
  Rb  Rb16  1  0.001  0.001  0.487  1.0
  Fe  Fe17  1  0.998  0.998  0.989  1.0
  Fe  Fe18  1  0.086  0.909  0.691  1.0
  Fe  Fe19  1  0.176  0.820  0.983  1.0
  Fe  Fe20  1  0.909  0.086  0.691  1.0
  Fe  Fe21  1  0.820  0.176  0.983  1.0
  O  O22  1  0.071  0.443  0.999  1.0
  O  O23  1  0.160  0.343  0.417  1.0
  O  O24  1  0.443  0.071  0.999  1.0
  O  O25  1  0.255  0.255  0.009  1.0
  O  O26  1  0.557  0.926  0.256  1.0
  O  O27  1  0.206  0.783  0.781  1.0
  O  O28  1  0.041  0.955  0.829  1.0
  O  O29  1  0.129  0.873  0.873  1.0
  O  O30  1  0.343  0.160  0.417  1.0
  O  O31  1  0.650  0.833  0.671  1.0
  O  O32  1  0.926  0.557  0.256  1.0
  O  O33  1  0.743  0.743  0.263  1.0
  O  O34  1  0.783  0.206  0.781  1.0
  O  O35  1  0.955  0.041  0.829  1.0
  O  O36  1  0.873  0.129  0.873  1.0
  O  O37  1  0.833  0.650  0.671  1.0
[/CIF]
.