The crystal structure described by Rb4Mg(FeO2)4 crystallizes in the triclinic P1 space group. There are four 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(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(8), and two equivalent O(6) atoms. In the fourth Rb site, Rb(4) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and two equivalent O(5) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(7), and one O(8) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form distorted corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form distorted corner-sharing FeO4 trigonal pyramids. In the third Fe site, Fe(3) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form corner-sharing FeO4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form corner-sharing FeO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(4), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(4) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(2), and one Fe(4) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(3), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(3) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(2), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Rb(2), two equivalent Rb(4), one Fe(2), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Rb(2), two equivalent Rb(3), one Fe(2), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(4), one Mg(1), one Fe(1), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), one Mg(1), one Fe(1), and one Fe(4) atom. is represented by the CIF file [CIF]
data_Rb4Mg(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.848
_cell_length_b   5.845
_cell_length_c   8.824
_cell_angle_alpha   88.411
_cell_angle_beta   88.907
_cell_angle_gamma   103.152
_symmetry_Int_Tables_number   1
_cell_volume   293.508
_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  0.015  0.044  0.627  1.0
  Rb  Rb1  1  0.414  0.559  0.114  1.0
  Rb  Rb2  1  0.492  0.986  0.829  1.0
  Rb  Rb3  1  0.950  0.561  0.424  1.0
  Mg  Mg4  1  0.777  0.254  0.126  1.0
  Fe  Fe5  1  0.079  0.958  0.125  1.0
  Fe  Fe6  1  0.455  0.500  0.622  1.0
  Fe  Fe7  1  0.552  0.004  0.375  1.0
  Fe  Fe8  1  0.942  0.492  0.870  1.0
  O  O9  1  0.944  0.611  0.084  1.0
  O  O10  1  0.164  0.595  0.716  1.0
  O  O11  1  0.431  0.080  0.169  1.0
  O  O12  1  0.516  0.195  0.536  1.0
  O  O13  1  0.471  0.686  0.424  1.0
  O  O14  1  0.641  0.508  0.812  1.0
  O  O15  1  0.883  0.089  0.298  1.0
  O  O16  1  0.950  0.171  0.951  1.0
[/CIF]
.
The crystal structure described by Rb4Mg(FeO2)4 crystallizes in the triclinic P1 space group. There are four 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(7), and one O(8) atom. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one O(5), one O(6), two equivalent O(1), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(8), and two equivalent O(6) atoms. In the fourth Rb site, Rb(4) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and two equivalent O(5) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(7), and one O(8) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(7), and one O(8) atom to form distorted corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form distorted corner-sharing FeO4 trigonal pyramids. In the third Fe site, Fe(3) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form corner-sharing FeO4 tetrahedra. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form corner-sharing FeO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(4), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(4) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(2), and one Fe(4) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one Rb(3), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(3) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(2), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Rb(2), two equivalent Rb(4), one Fe(2), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Rb(2), two equivalent Rb(3), one Fe(2), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(4), one Mg(1), one Fe(1), and one Fe(3) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(3), one Mg(1), one Fe(1), and one Fe(4) atom. is represented by the CIF file [CIF]
data_Rb4Mg(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.848
_cell_length_b   5.845
_cell_length_c   8.824
_cell_angle_alpha   88.411
_cell_angle_beta   88.907
_cell_angle_gamma   103.152
_symmetry_Int_Tables_number   1
_cell_volume   293.508
_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  0.015  0.044  0.627  1.0
  Rb  Rb1  1  0.414  0.559  0.114  1.0
  Rb  Rb2  1  0.492  0.986  0.829  1.0
  Rb  Rb3  1  0.950  0.561  0.424  1.0
  Mg  Mg4  1  0.777  0.254  0.126  1.0
  Fe  Fe5  1  0.079  0.958  0.125  1.0
  Fe  Fe6  1  0.455  0.500  0.622  1.0
  Fe  Fe7  1  0.552  0.004  0.375  1.0
  Fe  Fe8  1  0.942  0.492  0.870  1.0
  O  O9  1  0.944  0.611  0.084  1.0
  O  O10  1  0.164  0.595  0.716  1.0
  O  O11  1  0.431  0.080  0.169  1.0
  O  O12  1  0.516  0.195  0.536  1.0
  O  O13  1  0.471  0.686  0.424  1.0
  O  O14  1  0.641  0.508  0.812  1.0
  O  O15  1  0.883  0.089  0.298  1.0
  O  O16  1  0.950  0.171  0.951  1.0
[/CIF]
.