The compound described by Na4MnO4 crystallizes in the monoclinic Pc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra,  an edgeedge with one Na(4)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(3)O4 tetrahedra, corners with four equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(4)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(4)O4 tetrahedra,  an edgeedge with one Mn(1)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. In the fourth Na site, Na(4) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. Mn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MnO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with four equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. There are four 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(3), one Na(4), and one Mn(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 Na(4), and one Mn(1) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and one Mn(1) atom to form distorted corner-sharing ONa4Mn square pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and one Mn(1) atom to form distorted corner-sharing ONa4Mn trigonal bipyramids. is represented by the CIF file [CIF]
data_Na4MnO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   6.338
_cell_length_c   7.588
_cell_angle_alpha   89.615
_cell_angle_beta   90.004
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   274.270
_cell_formula_units_Z   2
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
  Mn  Mn0  1  0.182  0.990  0.996  1.0
  Mn  Mn1  1  0.818  0.490  0.496  1.0
  Na  Na2  1  0.894  0.045  0.665  1.0
  Na  Na3  1  0.106  0.545  0.165  1.0
  Na  Na4  1  0.311  0.309  0.726  1.0
  Na  Na5  1  0.689  0.809  0.226  1.0
  Na  Na6  1  0.379  0.228  0.315  1.0
  Na  Na7  1  0.621  0.728  0.815  1.0
  Na  Na8  1  0.697  0.262  0.001  1.0
  Na  Na9  1  0.303  0.762  0.501  1.0
  O  O10  1  0.258  0.263  0.025  1.0
  O  O11  1  0.741  0.763  0.525  1.0
  O  O12  1  0.127  0.434  0.476  1.0
  O  O13  1  0.873  0.934  0.976  1.0
  O  O14  1  0.726  0.433  0.269  1.0
  O  O15  1  0.274  0.933  0.769  1.0
  O  O16  1  0.700  0.380  0.704  1.0
  O  O17  1  0.300  0.880  0.204  1.0
[/CIF]
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The compound described by Na4MnO4 crystallizes in the monoclinic Pc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 trigonal pyramids that share corners with two equivalent Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra,  an edgeedge with one Na(4)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the second Na site, Na(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(3)O4 tetrahedra, corners with four equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(4)O4 tetrahedra, and  an edgeedge with one Mn(1)O4 tetrahedra. In the third Na site, Na(3) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with four equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(4)O4 tetrahedra,  an edgeedge with one Mn(1)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. In the fourth Na site, Na(4) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted NaO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. Mn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MnO4 tetrahedra that share corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra, corners with four equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(1)O4 trigonal pyramids,  an edgeedge with one Na(2)O4 tetrahedra,  an edgeedge with one Na(3)O4 tetrahedra, and  an edgeedge with one Na(1)O4 trigonal pyramid. There are four 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(3), one Na(4), and one Mn(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 Na(4), and one Mn(1) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and one Mn(1) atom to form distorted corner-sharing ONa4Mn square pyramids. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(3), one Na(4), and one Mn(1) atom to form distorted corner-sharing ONa4Mn trigonal bipyramids. is represented by the CIF file [CIF]
data_Na4MnO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.703
_cell_length_b   6.338
_cell_length_c   7.588
_cell_angle_alpha   89.615
_cell_angle_beta   90.004
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   274.270
_cell_formula_units_Z   2
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
  Mn  Mn0  1  0.182  0.990  0.996  1.0
  Mn  Mn1  1  0.818  0.490  0.496  1.0
  Na  Na2  1  0.894  0.045  0.665  1.0
  Na  Na3  1  0.106  0.545  0.165  1.0
  Na  Na4  1  0.311  0.309  0.726  1.0
  Na  Na5  1  0.689  0.809  0.226  1.0
  Na  Na6  1  0.379  0.228  0.315  1.0
  Na  Na7  1  0.621  0.728  0.815  1.0
  Na  Na8  1  0.697  0.262  0.001  1.0
  Na  Na9  1  0.303  0.762  0.501  1.0
  O  O10  1  0.258  0.263  0.025  1.0
  O  O11  1  0.741  0.763  0.525  1.0
  O  O12  1  0.127  0.434  0.476  1.0
  O  O13  1  0.873  0.934  0.976  1.0
  O  O14  1  0.726  0.433  0.269  1.0
  O  O15  1  0.274  0.933  0.769  1.0
  O  O16  1  0.700  0.380  0.704  1.0
  O  O17  1  0.300  0.880  0.204  1.0
[/CIF]
.