The compound described by Na4Mg(FeO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(6) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the fourth Na site, Na(4) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MgO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Na(4)O4 trigonal pyramid, and  an edgeedge with one Na(4)O4 trigonal pyramid. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form FeO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with three equivalent Na(4)O4 trigonal pyramids. 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 FeO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Na(4)O4 trigonal pyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Fe(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Mg(1), and one Fe(2) atom. In the third O site, O(3) is bonded to one Na(2), one Na(3), one Na(4), one Mg(1), and one Fe(1) atom to form distorted edge-sharing ONa3MgFe square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Fe(1), and one Fe(2) atom to form distorted edge-sharing ONa2Fe2 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(4), one Fe(1), and one Fe(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(FeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.146
_cell_length_b   5.933
_cell_length_c   6.126
_cell_angle_alpha   90.424
_cell_angle_beta   88.478
_cell_angle_gamma   58.572
_symmetry_Int_Tables_number   1
_cell_volume   190.486
_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
  Na  Na0  1  0.866  0.695  0.641  1.0
  Na  Na1  1  0.498  0.637  0.863  1.0
  Na  Na2  1  0.455  0.316  0.447  1.0
  Na  Na3  1  0.236  0.269  0.042  1.0
  Mg  Mg4  1  0.742  0.522  0.261  1.0
  Fe  Fe5  1  0.869  0.977  0.082  1.0
  Fe  Fe6  1  0.147  0.003  0.543  1.0
  O  O7  1  0.807  0.703  0.013  1.0
  O  O8  1  0.489  0.712  0.500  1.0
  O  O9  1  0.585  0.329  0.099  1.0
  O  O10  1  0.082  0.321  0.415  1.0
  O  O11  1  0.909  0.948  0.398  1.0
  O  O12  1  0.096  0.995  0.863  1.0
[/CIF]
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The compound described by Na4Mg(FeO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(6) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the fourth Na site, Na(4) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MgO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra,  a cornercorner with one Na(4)O4 trigonal pyramid, and  an edgeedge with one Na(4)O4 trigonal pyramid. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form FeO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, and corners with three equivalent Na(4)O4 trigonal pyramids. 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 FeO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, and corners with two equivalent Na(4)O4 trigonal pyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Fe(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Mg(1), and one Fe(2) atom. In the third O site, O(3) is bonded to one Na(2), one Na(3), one Na(4), one Mg(1), and one Fe(1) atom to form distorted edge-sharing ONa3MgFe square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Fe(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Fe(1), and one Fe(2) atom to form distorted edge-sharing ONa2Fe2 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(4), one Fe(1), and one Fe(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(FeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.146
_cell_length_b   5.933
_cell_length_c   6.126
_cell_angle_alpha   90.424
_cell_angle_beta   88.478
_cell_angle_gamma   58.572
_symmetry_Int_Tables_number   1
_cell_volume   190.486
_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
  Na  Na0  1  0.866  0.695  0.641  1.0
  Na  Na1  1  0.498  0.637  0.863  1.0
  Na  Na2  1  0.455  0.316  0.447  1.0
  Na  Na3  1  0.236  0.269  0.042  1.0
  Mg  Mg4  1  0.742  0.522  0.261  1.0
  Fe  Fe5  1  0.869  0.977  0.082  1.0
  Fe  Fe6  1  0.147  0.003  0.543  1.0
  O  O7  1  0.807  0.703  0.013  1.0
  O  O8  1  0.489  0.712  0.500  1.0
  O  O9  1  0.585  0.329  0.099  1.0
  O  O10  1  0.082  0.321  0.415  1.0
  O  O11  1  0.909  0.948  0.398  1.0
  O  O12  1  0.096  0.995  0.863  1.0
[/CIF]
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