The material structure described by Na4MgMn4O8 crystallizes in the tetragonal I-4m2 space group. Na(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. Mg(1) is bonded to four equivalent O(1) atoms to form MgO4 tetrahedra that share corners with eight equivalent Mn(1)O5 square pyramids. Mn(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O4 tetrahedra and edges with four equivalent Mn(1)O5 square pyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Mg(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded to three equivalent Na(1) and three equivalent Mn(1) atoms to form distorted edge-sharing ONa3Mn3 octahedra. is represented by the CIF card [CIF]
data_Na4MgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   7.264
_cell_length_c   6.047
_cell_angle_alpha   65.411
_cell_angle_beta   89.989
_cell_angle_gamma   114.593
_symmetry_Int_Tables_number   1
_cell_volume   214.715
_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  0.553  0.606  0.944  1.0
  Na  Na1  1  0.944  0.894  0.553  1.0
  Na  Na2  1  0.450  0.894  0.553  1.0
  Na  Na3  1  0.553  0.606  0.450  1.0
  Mg  Mg4  1  0.375  0.250  0.375  1.0
  Mn  Mn5  1  0.042  0.069  0.965  1.0
  Mn  Mn6  1  0.527  0.069  0.966  1.0
  Mn  Mn7  1  0.965  0.431  0.042  1.0
  Mn  Mn8  1  0.966  0.431  0.527  1.0
  O  O9  1  0.272  0.043  0.217  1.0
  O  O10  1  0.739  0.457  0.272  1.0
  O  O11  1  0.217  0.457  0.272  1.0
  O  O12  1  0.764  0.027  0.208  1.0
  O  O13  1  0.272  0.043  0.739  1.0
  O  O14  1  0.765  0.473  0.763  1.0
  O  O15  1  0.207  0.473  0.763  1.0
  O  O16  1  0.764  0.027  0.765  1.0
[/CIF]
.
The material structure described by Na4MgMn4O8 crystallizes in the tetragonal I-4m2 space group. Na(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. Mg(1) is bonded to four equivalent O(1) atoms to form MgO4 tetrahedra that share corners with eight equivalent Mn(1)O5 square pyramids. Mn(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O4 tetrahedra and edges with four equivalent Mn(1)O5 square pyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Mg(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded to three equivalent Na(1) and three equivalent Mn(1) atoms to form distorted edge-sharing ONa3Mn3 octahedra. is represented by the CIF card [CIF]
data_Na4MgMn4O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   7.264
_cell_length_c   6.047
_cell_angle_alpha   65.411
_cell_angle_beta   89.989
_cell_angle_gamma   114.593
_symmetry_Int_Tables_number   1
_cell_volume   214.715
_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  0.553  0.606  0.944  1.0
  Na  Na1  1  0.944  0.894  0.553  1.0
  Na  Na2  1  0.450  0.894  0.553  1.0
  Na  Na3  1  0.553  0.606  0.450  1.0
  Mg  Mg4  1  0.375  0.250  0.375  1.0
  Mn  Mn5  1  0.042  0.069  0.965  1.0
  Mn  Mn6  1  0.527  0.069  0.966  1.0
  Mn  Mn7  1  0.965  0.431  0.042  1.0
  Mn  Mn8  1  0.966  0.431  0.527  1.0
  O  O9  1  0.272  0.043  0.217  1.0
  O  O10  1  0.739  0.457  0.272  1.0
  O  O11  1  0.217  0.457  0.272  1.0
  O  O12  1  0.764  0.027  0.208  1.0
  O  O13  1  0.272  0.043  0.739  1.0
  O  O14  1  0.765  0.473  0.763  1.0
  O  O15  1  0.207  0.473  0.763  1.0
  O  O16  1  0.764  0.027  0.765  1.0
[/CIF]
.