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(1), one O(3), one O(4), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(6) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(7), and one O(8) atom. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(5), and one O(6) atom. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(4), one O(6), 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(2), one O(3), one O(4), and one O(8) atom to form corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing FeO4 tetrahedra. In the third Fe site, Fe(3) is bonded in a distorted rectangular see-saw-like geometry to one O(4), one O(6), one O(7), and one O(8) atom. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form corner-sharing FeO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Fe(2), and one Fe(4) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Rb(3), one Rb(4), one Fe(1), and one Fe(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Mg(1), one Fe(1), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Rb(3), one Rb(4), one Fe(2), and one Fe(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Rb(4), two equivalent Rb(2), one Mg(1), one Fe(3), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(3), two equivalent Rb(1), one Mg(1), one Fe(3), and one Fe(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(3), one Mg(1), one Fe(1), and one Fe(3) atom. is represented by the CIF file [CIF]
data_Rb4Mg(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.036
_cell_length_b   6.175
_cell_length_c   8.157
_cell_angle_alpha   91.046
_cell_angle_beta   89.284
_cell_angle_gamma   90.384
_symmetry_Int_Tables_number   1
_cell_volume   303.955
_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  0.205  0.207  0.486  1.0
  Rb  Rb1  1  0.234  0.671  0.762  1.0
  Rb  Rb2  1  0.669  0.236  0.225  1.0
  Rb  Rb3  1  0.851  0.715  0.075  1.0
  Mg  Mg4  1  0.655  0.006  0.788  1.0
  Fe  Fe5  1  0.205  0.195  0.987  1.0
  Fe  Fe6  1  0.301  0.696  0.252  1.0
  Fe  Fe7  1  0.715  0.389  0.742  1.0
  Fe  Fe8  1  0.787  0.806  0.496  1.0
  O  O9  1  0.083  0.767  0.423  1.0
  O  O10  1  0.321  0.904  0.083  1.0
  O  O11  1  0.209  0.423  0.168  1.0
  O  O12  1  0.416  0.223  0.795  1.0
  O  O13  1  0.589  0.670  0.350  1.0
  O  O14  1  0.726  0.703  0.725  1.0
  O  O15  1  0.737  0.101  0.554  1.0
  O  O16  1  0.881  0.205  0.896  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(1), one O(3), one O(4), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(6) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(7), and one O(8) atom. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(5), and one O(6) atom. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(4), one O(6), 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(2), one O(3), one O(4), and one O(8) atom to form corner-sharing FeO4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing FeO4 tetrahedra. In the third Fe site, Fe(3) is bonded in a distorted rectangular see-saw-like geometry to one O(4), one O(6), one O(7), and one O(8) atom. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form corner-sharing FeO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Fe(2), and one Fe(4) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Rb(3), one Rb(4), one Fe(1), and one Fe(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(3), one Rb(4), one Fe(1), and one Fe(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Mg(1), one Fe(1), and one Fe(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Rb(3), one Rb(4), one Fe(2), and one Fe(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Rb(4), two equivalent Rb(2), one Mg(1), one Fe(3), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Rb(3), two equivalent Rb(1), one Mg(1), one Fe(3), and one Fe(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(3), one Mg(1), one Fe(1), and one Fe(3) atom. is represented by the CIF file [CIF]
data_Rb4Mg(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.036
_cell_length_b   6.175
_cell_length_c   8.157
_cell_angle_alpha   91.046
_cell_angle_beta   89.284
_cell_angle_gamma   90.384
_symmetry_Int_Tables_number   1
_cell_volume   303.955
_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  0.205  0.207  0.486  1.0
  Rb  Rb1  1  0.234  0.671  0.762  1.0
  Rb  Rb2  1  0.669  0.236  0.225  1.0
  Rb  Rb3  1  0.851  0.715  0.075  1.0
  Mg  Mg4  1  0.655  0.006  0.788  1.0
  Fe  Fe5  1  0.205  0.195  0.987  1.0
  Fe  Fe6  1  0.301  0.696  0.252  1.0
  Fe  Fe7  1  0.715  0.389  0.742  1.0
  Fe  Fe8  1  0.787  0.806  0.496  1.0
  O  O9  1  0.083  0.767  0.423  1.0
  O  O10  1  0.321  0.904  0.083  1.0
  O  O11  1  0.209  0.423  0.168  1.0
  O  O12  1  0.416  0.223  0.795  1.0
  O  O13  1  0.589  0.670  0.350  1.0
  O  O14  1  0.726  0.703  0.725  1.0
  O  O15  1  0.737  0.101  0.554  1.0
  O  O16  1  0.881  0.205  0.896  1.0
[/CIF]
.