The structure described by Na3MnO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded in a distorted square co-planar geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded to one Na(1), two equivalent Na(2), two equivalent Na(3), and one Mn(1) atom to form distorted ONa5Mn octahedra that share corners with two equivalent O(2)Na5Mn octahedra, corners with three equivalent O(3)Na6Mn pentagonal bipyramids,  an edgeedge with one O(2)Na5Mn octahedra,  an edgeedge with one O(3)Na6Mn pentagonal bipyramid, and faces with two equivalent O(3)Na6Mn pentagonal bipyramids. The corner-sharing octahedral tilt angles are 67°. In the third O site, O(3) is bonded to two equivalent Na(1), two equivalent Na(2), two equivalent Na(3), and one Mn(1) atom to form distorted ONa6Mn pentagonal bipyramids that share corners with three equivalent O(2)Na5Mn octahedra,  an edgeedge with one O(2)Na5Mn octahedra, edges with three equivalent O(3)Na6Mn pentagonal bipyramids, and faces with two equivalent O(2)Na5Mn octahedra. The corner-sharing octahedral tilt angles range from 47-60°. is represented by the CIF card [CIF]
data_Na3MnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.048
_cell_length_b   10.883
_cell_length_c   6.078
_cell_angle_alpha   90.000
_cell_angle_beta   91.742
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.889
_cell_formula_units_Z   4
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  0.908  0.776  0.046  1.0
  Na  Na1  1  0.408  0.724  0.046  1.0
  Na  Na2  1  0.592  0.276  0.954  1.0
  Na  Na3  1  0.092  0.224  0.954  1.0
  Na  Na4  1  0.858  0.003  0.354  1.0
  Na  Na5  1  0.358  0.497  0.354  1.0
  Na  Na6  1  0.642  0.503  0.646  1.0
  Na  Na7  1  0.142  0.997  0.646  1.0
  Na  Na8  1  0.983  0.278  0.506  1.0
  Na  Na9  1  0.517  0.778  0.494  1.0
  Na  Na10  1  0.483  0.222  0.506  1.0
  Na  Na11  1  0.017  0.722  0.494  1.0
  Mn  Mn12  1  0.668  0.997  0.835  1.0
  Mn  Mn13  1  0.168  0.503  0.836  1.0
  Mn  Mn14  1  0.832  0.497  0.165  1.0
  Mn  Mn15  1  0.332  0.003  0.164  1.0
  O  O16  1  0.606  0.912  0.111  1.0
  O  O17  1  0.894  0.412  0.889  1.0
  O  O18  1  0.106  0.588  0.111  1.0
  O  O19  1  0.394  0.088  0.889  1.0
  O  O20  1  0.681  0.368  0.300  1.0
  O  O21  1  0.819  0.868  0.700  1.0
  O  O22  1  0.181  0.132  0.300  1.0
  O  O23  1  0.319  0.632  0.700  1.0
  O  O24  1  0.692  0.627  0.305  1.0
  O  O25  1  0.808  0.127  0.695  1.0
  O  O26  1  0.192  0.873  0.305  1.0
  O  O27  1  0.308  0.373  0.695  1.0
[/CIF]
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The structure described by Na3MnO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded in a distorted square co-planar geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), two equivalent Na(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded to one Na(1), two equivalent Na(2), two equivalent Na(3), and one Mn(1) atom to form distorted ONa5Mn octahedra that share corners with two equivalent O(2)Na5Mn octahedra, corners with three equivalent O(3)Na6Mn pentagonal bipyramids,  an edgeedge with one O(2)Na5Mn octahedra,  an edgeedge with one O(3)Na6Mn pentagonal bipyramid, and faces with two equivalent O(3)Na6Mn pentagonal bipyramids. The corner-sharing octahedral tilt angles are 67°. In the third O site, O(3) is bonded to two equivalent Na(1), two equivalent Na(2), two equivalent Na(3), and one Mn(1) atom to form distorted ONa6Mn pentagonal bipyramids that share corners with three equivalent O(2)Na5Mn octahedra,  an edgeedge with one O(2)Na5Mn octahedra, edges with three equivalent O(3)Na6Mn pentagonal bipyramids, and faces with two equivalent O(2)Na5Mn octahedra. The corner-sharing octahedral tilt angles range from 47-60°. is represented by the CIF card [CIF]
data_Na3MnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.048
_cell_length_b   10.883
_cell_length_c   6.078
_cell_angle_alpha   90.000
_cell_angle_beta   91.742
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.889
_cell_formula_units_Z   4
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  0.908  0.776  0.046  1.0
  Na  Na1  1  0.408  0.724  0.046  1.0
  Na  Na2  1  0.592  0.276  0.954  1.0
  Na  Na3  1  0.092  0.224  0.954  1.0
  Na  Na4  1  0.858  0.003  0.354  1.0
  Na  Na5  1  0.358  0.497  0.354  1.0
  Na  Na6  1  0.642  0.503  0.646  1.0
  Na  Na7  1  0.142  0.997  0.646  1.0
  Na  Na8  1  0.983  0.278  0.506  1.0
  Na  Na9  1  0.517  0.778  0.494  1.0
  Na  Na10  1  0.483  0.222  0.506  1.0
  Na  Na11  1  0.017  0.722  0.494  1.0
  Mn  Mn12  1  0.668  0.997  0.835  1.0
  Mn  Mn13  1  0.168  0.503  0.836  1.0
  Mn  Mn14  1  0.832  0.497  0.165  1.0
  Mn  Mn15  1  0.332  0.003  0.164  1.0
  O  O16  1  0.606  0.912  0.111  1.0
  O  O17  1  0.894  0.412  0.889  1.0
  O  O18  1  0.106  0.588  0.111  1.0
  O  O19  1  0.394  0.088  0.889  1.0
  O  O20  1  0.681  0.368  0.300  1.0
  O  O21  1  0.819  0.868  0.700  1.0
  O  O22  1  0.181  0.132  0.300  1.0
  O  O23  1  0.319  0.632  0.700  1.0
  O  O24  1  0.692  0.627  0.305  1.0
  O  O25  1  0.808  0.127  0.695  1.0
  O  O26  1  0.192  0.873  0.305  1.0
  O  O27  1  0.308  0.373  0.695  1.0
[/CIF]
.