The crystal structure described by Rb5K7(Fe2O5)2 crystallizes in the triclinic P1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(7) atom. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(6), and one O(8) atom. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(6), one O(8), and one O(9) atom. In the fourth Rb site, Rb(4) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(4), one O(5), and one O(7) atom. In the fifth Rb site, Rb(5) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(8), and one O(9) atom. There are seven inequivalent K sites. In the first K site, K(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form distorted edge-sharing KO4 tetrahedra. In the second K site, K(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form distorted edge-sharing KO4 tetrahedra. In the third K site, K(3) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form distorted edge-sharing KO4 tetrahedra. In the fourth K site, K(4) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form distorted edge-sharing KO4 tetrahedra. In the fifth K site, K(5) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(5), and one O(8) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(6), one O(7), and one O(9) atom. In the seventh K site, K(7) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(4), one O(6), and one O(7) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(9) atom. In the second Fe site, Fe(2) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(4) atom. In the third Fe site, Fe(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded in a trigonal planar geometry to one O(10), one O(6), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one K(2), one K(3), one K(6), one K(7), and one Fe(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one K(1), one K(4), one K(5), and one Fe(2) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one K(1), one K(4), one K(5), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one K(2), one K(3), one K(6), one K(7), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one K(2), one K(3), one K(5), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one K(1), one K(4), one K(6), one K(7), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one K(1), one K(4), one K(6), one K(7), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one K(2), one K(3), one K(5), and one Fe(4) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Rb(3), one Rb(5), one K(6), one Fe(1), and one Fe(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Rb(4), one K(5), one K(7), one Fe(2), and one Fe(4) atom. is represented by the CIF file [CIF]
data_K7Rb5(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.014
_cell_length_b   9.722
_cell_length_c   9.727
_cell_angle_alpha   73.981
_cell_angle_beta   68.946
_cell_angle_gamma   68.930
_symmetry_Int_Tables_number   1
_cell_volume   569.358
_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
  K  K0  1  0.501  0.280  0.720  1.0
  K  K1  1  0.999  0.782  0.222  1.0
  K  K2  1  0.499  0.722  0.281  1.0
  K  K3  1  0.000  0.221  0.780  1.0
  K  K4  1  0.752  0.489  0.009  1.0
  K  K5  1  0.252  0.989  0.509  1.0
  K  K6  1  0.752  0.009  0.490  1.0
  Rb  Rb7  1  0.753  0.907  0.906  1.0
  Rb  Rb8  1  0.252  0.406  0.408  1.0
  Rb  Rb9  1  0.744  0.595  0.593  1.0
  Rb  Rb10  1  0.245  0.093  0.095  1.0
  Rb  Rb11  1  0.251  0.508  0.992  1.0
  Fe  Fe12  1  0.151  0.654  0.652  1.0
  Fe  Fe13  1  0.653  0.151  0.153  1.0
  Fe  Fe14  1  0.362  0.844  0.842  1.0
  Fe  Fe15  1  0.859  0.343  0.345  1.0
  O  O16  1  0.088  0.755  0.470  1.0
  O  O17  1  0.597  0.248  0.969  1.0
  O  O18  1  0.088  0.472  0.752  1.0
  O  O19  1  0.588  0.971  0.255  1.0
  O  O20  1  0.409  0.750  0.030  1.0
  O  O21  1  0.909  0.247  0.531  1.0
  O  O22  1  0.409  0.031  0.747  1.0
  O  O23  1  0.900  0.532  0.254  1.0
  O  O24  1  0.291  0.739  0.732  1.0
  O  O25  1  0.792  0.236  0.235  1.0
[/CIF]
.
The crystal structure described by Rb5K7(Fe2O5)2 crystallizes in the triclinic P1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(7) atom. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(6), and one O(8) atom. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(6), one O(8), and one O(9) atom. In the fourth Rb site, Rb(4) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(4), one O(5), and one O(7) atom. In the fifth Rb site, Rb(5) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(8), and one O(9) atom. There are seven inequivalent K sites. In the first K site, K(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form distorted edge-sharing KO4 tetrahedra. In the second K site, K(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form distorted edge-sharing KO4 tetrahedra. In the third K site, K(3) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form distorted edge-sharing KO4 tetrahedra. In the fourth K site, K(4) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form distorted edge-sharing KO4 tetrahedra. In the fifth K site, K(5) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(5), and one O(8) atom. In the sixth K site, K(6) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(6), one O(7), and one O(9) atom. In the seventh K site, K(7) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(4), one O(6), and one O(7) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(9) atom. In the second Fe site, Fe(2) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(4) atom. In the third Fe site, Fe(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(9) atom. In the fourth Fe site, Fe(4) is bonded in a trigonal planar geometry to one O(10), one O(6), and one O(8) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one K(2), one K(3), one K(6), one K(7), and one Fe(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one K(1), one K(4), one K(5), and one Fe(2) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one K(1), one K(4), one K(5), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one K(2), one K(3), one K(6), one K(7), and one Fe(2) atom. In the fifth O site, O(5) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one Rb(5), one K(2), one K(3), one K(5), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one K(1), one K(4), one K(6), one K(7), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 7-coordinate geometry to one Rb(1), one Rb(4), one K(1), one K(4), one K(6), one K(7), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 7-coordinate geometry to one Rb(2), one Rb(3), one Rb(5), one K(2), one K(3), one K(5), and one Fe(4) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Rb(3), one Rb(5), one K(6), one Fe(1), and one Fe(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Rb(4), one K(5), one K(7), one Fe(2), and one Fe(4) atom. is represented by the CIF file [CIF]
data_K7Rb5(Fe2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.014
_cell_length_b   9.722
_cell_length_c   9.727
_cell_angle_alpha   73.981
_cell_angle_beta   68.946
_cell_angle_gamma   68.930
_symmetry_Int_Tables_number   1
_cell_volume   569.358
_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
  K  K0  1  0.501  0.280  0.720  1.0
  K  K1  1  0.999  0.782  0.222  1.0
  K  K2  1  0.499  0.722  0.281  1.0
  K  K3  1  0.000  0.221  0.780  1.0
  K  K4  1  0.752  0.489  0.009  1.0
  K  K5  1  0.252  0.989  0.509  1.0
  K  K6  1  0.752  0.009  0.490  1.0
  Rb  Rb7  1  0.753  0.907  0.906  1.0
  Rb  Rb8  1  0.252  0.406  0.408  1.0
  Rb  Rb9  1  0.744  0.595  0.593  1.0
  Rb  Rb10  1  0.245  0.093  0.095  1.0
  Rb  Rb11  1  0.251  0.508  0.992  1.0
  Fe  Fe12  1  0.151  0.654  0.652  1.0
  Fe  Fe13  1  0.653  0.151  0.153  1.0
  Fe  Fe14  1  0.362  0.844  0.842  1.0
  Fe  Fe15  1  0.859  0.343  0.345  1.0
  O  O16  1  0.088  0.755  0.470  1.0
  O  O17  1  0.597  0.248  0.969  1.0
  O  O18  1  0.088  0.472  0.752  1.0
  O  O19  1  0.588  0.971  0.255  1.0
  O  O20  1  0.409  0.750  0.030  1.0
  O  O21  1  0.909  0.247  0.531  1.0
  O  O22  1  0.409  0.031  0.747  1.0
  O  O23  1  0.900  0.532  0.254  1.0
  O  O24  1  0.291  0.739  0.732  1.0
  O  O25  1  0.792  0.236  0.235  1.0
[/CIF]
.