The crystal structure described by Na8MgMn2O8 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(7) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(4) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(8) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(6) atom. In the fifth Na site, Na(5) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 trigonal pyramids, and  an edgeedge with one Na(8)O4 tetrahedra. In the sixth Na site, Na(6) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Na(8)O4 tetrahedra,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Mn(2)O4 trigonal pyramid. In the seventh Na site, Na(7) is bonded in a distorted see-saw-like geometry to one O(3), one O(5), one O(6), and one O(8) atom. In the eighth Na site, Na(8) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form distorted NaO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 trigonal pyramids,  an edgeedge with one Na(5)O4 trigonal pyramid, and  an edgeedge with one Na(6)O4 trigonal pyramid. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share  a cornercorner with one Na(8)O4 tetrahedra,  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid,  a cornercorner with one Mn(2)O4 trigonal pyramid,  an edgeedge with one Mn(1)O4 tetrahedra, and  an edgeedge with one Na(6)O4 trigonal pyramid. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(6), one O(7), and one O(8) atom to form distorted MnO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Na(8)O4 tetrahedra, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(6)O4 trigonal pyramids, and  an edgeedge with one Mg(1)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form distorted MnO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Na(8)O4 tetrahedra, corners with two equivalent Na(5)O4 trigonal pyramids, and  an edgeedge with one Na(6)O4 trigonal pyramid. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Na(4), one Na(5), one Mg(1), and one Mn(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Na(5), one Na(8), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing ONa5Mn pentagonal pyramids. In the third O site, O(3) is bonded to one Na(3), one Na(4), one Na(5), one Na(7), and one Mn(2) atom to form distorted ONa4Mn trigonal bipyramids that share  a cornercorner with one O(2)Na5Mn pentagonal pyramid, corners with three equivalent O(8)Na4Mn trigonal bipyramids,  an edgeedge with one O(2)Na5Mn pentagonal pyramid, and  an edgeedge with one O(5)Na4Mn trigonal bipyramid. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(6), one Mg(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(6), one Na(7), one Na(8), and one Mn(2) atom to form ONa4Mn trigonal bipyramids that share corners with three equivalent O(2)Na5Mn pentagonal pyramids, corners with two equivalent O(8)Na4Mn trigonal bipyramids, and  an edgeedge with one O(3)Na4Mn trigonal bipyramid. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Na(4), one Na(6), one Na(7), one Mg(1), and one Mn(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(6), one Na(8), one Mg(1), and one Mn(1) atom. In the eighth O site, O(8) is bonded to one Na(3), one Na(5), one Na(7), one Na(8), and one Mn(1) atom to form distorted ONa4Mn trigonal bipyramids that share  a cornercorner with one O(2)Na5Mn pentagonal pyramid, corners with two equivalent O(5)Na4Mn trigonal bipyramids, corners with three equivalent O(3)Na4Mn trigonal bipyramids, and  an edgeedge with one O(2)Na5Mn pentagonal pyramid. is represented by the CIF card [CIF]
data_Na8MgMn2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.305
_cell_length_b   7.853
_cell_length_c   5.618
_cell_angle_alpha   91.332
_cell_angle_beta   91.835
_cell_angle_gamma   88.144
_symmetry_Int_Tables_number   1
_cell_volume   277.827
_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  0.050  0.602  0.966  1.0
  Na  Na1  1  0.440  0.765  0.153  1.0
  Na  Na2  1  0.172  0.326  0.378  1.0
  Na  Na3  1  0.304  0.062  0.789  1.0
  Na  Na4  1  0.528  0.189  0.274  1.0
  Na  Na5  1  0.686  0.807  0.635  1.0
  Na  Na6  1  0.817  0.231  0.769  1.0
  Na  Na7  1  0.735  0.489  0.310  1.0
  Mg  Mg8  1  0.117  0.818  0.547  1.0
  Mn  Mn9  1  0.976  0.987  0.147  1.0
  Mn  Mn10  1  0.491  0.493  0.800  1.0
  O  O11  1  0.248  0.990  0.330  1.0
  O  O12  1  0.382  0.470  0.116  1.0
  O  O13  1  0.461  0.277  0.658  1.0
  O  O14  1  0.359  0.727  0.742  1.0
  O  O15  1  0.778  0.527  0.711  1.0
  O  O16  1  0.960  0.954  0.802  1.0
  O  O17  1  0.901  0.769  0.280  1.0
  O  O18  1  0.878  0.215  0.186  1.0
[/CIF]
.
The crystal structure described by Na8MgMn2O8 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(7) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(4) atom. In the third Na site, Na(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(8) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(6) atom. In the fifth Na site, Na(5) is bonded to one O(1), one O(2), one O(3), and one O(8) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 trigonal pyramids, and  an edgeedge with one Na(8)O4 tetrahedra. In the sixth Na site, Na(6) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form distorted NaO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Na(8)O4 tetrahedra,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Mn(2)O4 trigonal pyramid. In the seventh Na site, Na(7) is bonded in a distorted see-saw-like geometry to one O(3), one O(5), one O(6), and one O(8) atom. In the eighth Na site, Na(8) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form distorted NaO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Mn(1)O4 tetrahedra, corners with two equivalent Mn(2)O4 trigonal pyramids,  an edgeedge with one Na(5)O4 trigonal pyramid, and  an edgeedge with one Na(6)O4 trigonal pyramid. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share  a cornercorner with one Na(8)O4 tetrahedra,  a cornercorner with one Mn(1)O4 tetrahedra,  a cornercorner with one Na(5)O4 trigonal pyramid,  a cornercorner with one Na(6)O4 trigonal pyramid,  a cornercorner with one Mn(2)O4 trigonal pyramid,  an edgeedge with one Mn(1)O4 tetrahedra, and  an edgeedge with one Na(6)O4 trigonal pyramid. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(6), one O(7), and one O(8) atom to form distorted MnO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Na(8)O4 tetrahedra, corners with two equivalent Na(5)O4 trigonal pyramids, corners with two equivalent Na(6)O4 trigonal pyramids, and  an edgeedge with one Mg(1)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form distorted MnO4 trigonal pyramids that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Na(8)O4 tetrahedra, corners with two equivalent Na(5)O4 trigonal pyramids, and  an edgeedge with one Na(6)O4 trigonal pyramid. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(2), one Na(3), one Na(4), one Na(5), one Mg(1), and one Mn(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), one Na(5), one Na(8), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing ONa5Mn pentagonal pyramids. In the third O site, O(3) is bonded to one Na(3), one Na(4), one Na(5), one Na(7), and one Mn(2) atom to form distorted ONa4Mn trigonal bipyramids that share  a cornercorner with one O(2)Na5Mn pentagonal pyramid, corners with three equivalent O(8)Na4Mn trigonal bipyramids,  an edgeedge with one O(2)Na5Mn pentagonal pyramid, and  an edgeedge with one O(5)Na4Mn trigonal bipyramid. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(6), one Mg(1), and one Mn(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(6), one Na(7), one Na(8), and one Mn(2) atom to form ONa4Mn trigonal bipyramids that share corners with three equivalent O(2)Na5Mn pentagonal pyramids, corners with two equivalent O(8)Na4Mn trigonal bipyramids, and  an edgeedge with one O(3)Na4Mn trigonal bipyramid. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Na(4), one Na(6), one Na(7), one Mg(1), and one Mn(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Na(1), one Na(6), one Na(8), one Mg(1), and one Mn(1) atom. In the eighth O site, O(8) is bonded to one Na(3), one Na(5), one Na(7), one Na(8), and one Mn(1) atom to form distorted ONa4Mn trigonal bipyramids that share  a cornercorner with one O(2)Na5Mn pentagonal pyramid, corners with two equivalent O(5)Na4Mn trigonal bipyramids, corners with three equivalent O(3)Na4Mn trigonal bipyramids, and  an edgeedge with one O(2)Na5Mn pentagonal pyramid. is represented by the CIF card [CIF]
data_Na8MgMn2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.305
_cell_length_b   7.853
_cell_length_c   5.618
_cell_angle_alpha   91.332
_cell_angle_beta   91.835
_cell_angle_gamma   88.144
_symmetry_Int_Tables_number   1
_cell_volume   277.827
_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  0.050  0.602  0.966  1.0
  Na  Na1  1  0.440  0.765  0.153  1.0
  Na  Na2  1  0.172  0.326  0.378  1.0
  Na  Na3  1  0.304  0.062  0.789  1.0
  Na  Na4  1  0.528  0.189  0.274  1.0
  Na  Na5  1  0.686  0.807  0.635  1.0
  Na  Na6  1  0.817  0.231  0.769  1.0
  Na  Na7  1  0.735  0.489  0.310  1.0
  Mg  Mg8  1  0.117  0.818  0.547  1.0
  Mn  Mn9  1  0.976  0.987  0.147  1.0
  Mn  Mn10  1  0.491  0.493  0.800  1.0
  O  O11  1  0.248  0.990  0.330  1.0
  O  O12  1  0.382  0.470  0.116  1.0
  O  O13  1  0.461  0.277  0.658  1.0
  O  O14  1  0.359  0.727  0.742  1.0
  O  O15  1  0.778  0.527  0.711  1.0
  O  O16  1  0.960  0.954  0.802  1.0
  O  O17  1  0.901  0.769  0.280  1.0
  O  O18  1  0.878  0.215  0.186  1.0
[/CIF]
.