The structure described by Na4Mg(FeO3)2 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted corner-sharing FeO4 trigonal pyramids. In the second Fe site, Fe(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing FeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Mg(1), one Fe(1), and one Fe(2) atom to form distorted ONa2MgFe2 square pyramids that share  a cornercorner with one O(1)Na2MgFe2 square pyramid, corners with six equivalent O(2)Na2MgFe tetrahedra, corners with two equivalent O(3)Na4Fe trigonal bipyramids,  an edgeedge with one O(1)Na2MgFe2 square pyramid, and edges with two equivalent O(3)Na4Fe trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Na(1), one Mg(1), and one Fe(2) atom to form ONa2MgFe tetrahedra that share corners with six equivalent O(1)Na2MgFe2 square pyramids, corners with four equivalent O(3)Na4Fe trigonal bipyramids, and  an edgeedge with one O(2)Na2MgFe tetrahedra. In the third O site, O(3) is bonded to four equivalent Na(1) and one Fe(1) atom to form distorted ONa4Fe trigonal bipyramids that share corners with two equivalent O(1)Na2MgFe2 square pyramids, corners with four equivalent O(2)Na2MgFe tetrahedra,  a cornercorner with one O(3)Na4Fe trigonal bipyramid, edges with two equivalent O(1)Na2MgFe2 square pyramids, and edges with two equivalent O(3)Na4Fe trigonal bipyramids. is represented by the CIF card [CIF]
data_Na4Mg(FeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.748
_cell_length_b   6.508
_cell_length_c   6.004
_cell_angle_alpha   89.999
_cell_angle_beta   61.387
_cell_angle_gamma   89.994
_symmetry_Int_Tables_number   1
_cell_volume   197.165
_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  0.262  0.517  0.541  1.0
  Na  Na1  1  0.262  0.980  0.541  1.0
  Na  Na2  1  0.793  0.517  0.479  1.0
  Na  Na3  1  0.793  0.980  0.479  1.0
  Mg  Mg4  1  0.326  0.249  0.010  1.0
  Fe  Fe5  1  0.195  0.748  0.010  1.0
  Fe  Fe6  1  0.810  0.248  0.010  1.0
  O  O7  1  0.055  0.038  0.010  1.0
  O  O8  1  0.055  0.459  0.010  1.0
  O  O9  1  0.718  0.248  0.747  1.0
  O  O10  1  0.455  0.248  0.273  1.0
  O  O11  1  0.143  0.748  0.337  1.0
  O  O12  1  0.470  0.748  0.683  1.0
[/CIF]
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The structure described by Na4Mg(FeO3)2 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted corner-sharing FeO4 trigonal pyramids. In the second Fe site, Fe(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted corner-sharing FeO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), one Mg(1), one Fe(1), and one Fe(2) atom to form distorted ONa2MgFe2 square pyramids that share  a cornercorner with one O(1)Na2MgFe2 square pyramid, corners with six equivalent O(2)Na2MgFe tetrahedra, corners with two equivalent O(3)Na4Fe trigonal bipyramids,  an edgeedge with one O(1)Na2MgFe2 square pyramid, and edges with two equivalent O(3)Na4Fe trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Na(1), one Mg(1), and one Fe(2) atom to form ONa2MgFe tetrahedra that share corners with six equivalent O(1)Na2MgFe2 square pyramids, corners with four equivalent O(3)Na4Fe trigonal bipyramids, and  an edgeedge with one O(2)Na2MgFe tetrahedra. In the third O site, O(3) is bonded to four equivalent Na(1) and one Fe(1) atom to form distorted ONa4Fe trigonal bipyramids that share corners with two equivalent O(1)Na2MgFe2 square pyramids, corners with four equivalent O(2)Na2MgFe tetrahedra,  a cornercorner with one O(3)Na4Fe trigonal bipyramid, edges with two equivalent O(1)Na2MgFe2 square pyramids, and edges with two equivalent O(3)Na4Fe trigonal bipyramids. is represented by the CIF card [CIF]
data_Na4Mg(FeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.748
_cell_length_b   6.508
_cell_length_c   6.004
_cell_angle_alpha   89.999
_cell_angle_beta   61.387
_cell_angle_gamma   89.994
_symmetry_Int_Tables_number   1
_cell_volume   197.165
_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  0.262  0.517  0.541  1.0
  Na  Na1  1  0.262  0.980  0.541  1.0
  Na  Na2  1  0.793  0.517  0.479  1.0
  Na  Na3  1  0.793  0.980  0.479  1.0
  Mg  Mg4  1  0.326  0.249  0.010  1.0
  Fe  Fe5  1  0.195  0.748  0.010  1.0
  Fe  Fe6  1  0.810  0.248  0.010  1.0
  O  O7  1  0.055  0.038  0.010  1.0
  O  O8  1  0.055  0.459  0.010  1.0
  O  O9  1  0.718  0.248  0.747  1.0
  O  O10  1  0.455  0.248  0.273  1.0
  O  O11  1  0.143  0.748  0.337  1.0
  O  O12  1  0.470  0.748  0.683  1.0
[/CIF]
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