The compound described by Na4MgMn2O6 crystallizes in the monoclinic Cm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 1-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), and two equivalent O(1) atoms. In the third Na site, Na(3) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. Mg(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form MgO4 tetrahedra that share corners with six equivalent Mn(1)O5 trigonal bipyramids. Mn(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form MnO5 trigonal bipyramids that share corners with three equivalent Mg(1)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and edges with two equivalent Mn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), two equivalent Na(2), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(2), one Mg(1), and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), two equivalent Na(2), and one Mg(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4MgMn2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.187
_cell_length_b   5.574
_cell_length_c   12.535
_cell_angle_alpha   85.606
_cell_angle_beta   158.660
_cell_angle_gamma   104.012
_symmetry_Int_Tables_number   1
_cell_volume   160.748
_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  0.583  0.499  0.008  1.0
  Na  Na1  1  0.939  0.073  0.188  1.0
  Na  Na2  1  0.791  0.926  0.614  1.0
  Na  Na3  1  0.161  0.499  0.133  1.0
  Mg  Mg4  1  0.893  0.499  0.799  1.0
  Mn  Mn5  1  0.382  0.853  0.670  1.0
  Mn  Mn6  1  0.675  0.146  0.317  1.0
  O  O7  1  0.292  0.108  0.720  1.0
  O  O8  1  0.682  0.826  0.228  1.0
  O  O9  1  0.260  0.499  0.551  1.0
  O  O10  1  0.074  0.891  0.111  1.0
  O  O11  1  0.029  0.173  0.902  1.0
  O  O12  1  0.696  0.499  0.549  1.0
[/CIF]
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The compound described by Na4MgMn2O6 crystallizes in the monoclinic Cm space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 1-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), and two equivalent O(1) atoms. In the third Na site, Na(3) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. Mg(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form MgO4 tetrahedra that share corners with six equivalent Mn(1)O5 trigonal bipyramids. Mn(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form MnO5 trigonal bipyramids that share corners with three equivalent Mg(1)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid, and edges with two equivalent Mn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), two equivalent Na(2), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(2), one Mg(1), and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), two equivalent Na(2), and one Mg(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4MgMn2O6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.187
_cell_length_b   5.574
_cell_length_c   12.535
_cell_angle_alpha   85.606
_cell_angle_beta   158.660
_cell_angle_gamma   104.012
_symmetry_Int_Tables_number   1
_cell_volume   160.748
_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  0.583  0.499  0.008  1.0
  Na  Na1  1  0.939  0.073  0.188  1.0
  Na  Na2  1  0.791  0.926  0.614  1.0
  Na  Na3  1  0.161  0.499  0.133  1.0
  Mg  Mg4  1  0.893  0.499  0.799  1.0
  Mn  Mn5  1  0.382  0.853  0.670  1.0
  Mn  Mn6  1  0.675  0.146  0.317  1.0
  O  O7  1  0.292  0.108  0.720  1.0
  O  O8  1  0.682  0.826  0.228  1.0
  O  O9  1  0.260  0.499  0.551  1.0
  O  O10  1  0.074  0.891  0.111  1.0
  O  O11  1  0.029  0.173  0.902  1.0
  O  O12  1  0.696  0.499  0.549  1.0
[/CIF]
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