The compound described by Rb2Mg(FeO2)2 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Mg(1) is bonded in an L-shaped geometry to two equivalent O(1) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Fe site, Fe(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(2), two equivalent Rb(1), one Fe(1), and one Fe(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Mg(FeO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.968
_cell_length_b   5.968
_cell_length_c   6.004
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   55.221
_symmetry_Int_Tables_number   1
_cell_volume   175.637
_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  0.350  0.350  0.250  1.0
  Rb  Rb1  1  0.655  0.655  0.750  1.0
  Mg  Mg2  1  0.264  0.264  0.750  1.0
  Fe  Fe3  1  0.017  0.017  0.250  1.0
  Fe  Fe4  1  0.989  0.989  0.750  1.0
  O  O5  1  0.141  0.141  0.983  1.0
  O  O6  1  0.141  0.141  0.517  1.0
  O  O7  1  0.881  0.881  0.005  1.0
  O  O8  1  0.881  0.881  0.495  1.0
[/CIF]
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The compound described by Rb2Mg(FeO2)2 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Mg(1) is bonded in an L-shaped geometry to two equivalent O(1) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Fe site, Fe(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), two equivalent Rb(2), one Mg(1), one Fe(1), and one Fe(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Rb(2), two equivalent Rb(1), one Fe(1), and one Fe(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Mg(FeO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.968
_cell_length_b   5.968
_cell_length_c   6.004
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   55.221
_symmetry_Int_Tables_number   1
_cell_volume   175.637
_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  0.350  0.350  0.250  1.0
  Rb  Rb1  1  0.655  0.655  0.750  1.0
  Mg  Mg2  1  0.264  0.264  0.750  1.0
  Fe  Fe3  1  0.017  0.017  0.250  1.0
  Fe  Fe4  1  0.989  0.989  0.750  1.0
  O  O5  1  0.141  0.141  0.983  1.0
  O  O6  1  0.141  0.141  0.517  1.0
  O  O7  1  0.881  0.881  0.005  1.0
  O  O8  1  0.881  0.881  0.495  1.0
[/CIF]
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