The structure described by Na8MgMo2(NO)4 crystallizes in the triclinic P1 space group. There are eight 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 tetrahedra that share  a cornercorner with one Mg(1)N3O tetrahedra, corners with two equivalent Mo(1)N2O2 tetrahedra, and corners with two equivalent Mo(2)N2O2 tetrahedra. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(3) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(1) atom. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), and one N(4) atom. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one N(1), one N(3), one O(2), and one O(3) atom. In the seventh Na site, Na(7) is bonded in a 4-coordinate geometry to one N(1), one N(3), one O(3), and one O(4) atom. In the eighth Na site, Na(8) is bonded in a 2-coordinate geometry to one N(2), one N(4), and one O(2) atom. Mg(1) is bonded to one N(2), one N(3), one N(4), and one O(1) atom to form distorted MgN3O tetrahedra that share  a cornercorner with one Na(1)O4 tetrahedra,  a cornercorner with one Mo(2)N2O2 tetrahedra, and corners with three equivalent Mo(1)N2O2 tetrahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one N(2), one N(4), one O(1), and one O(4) atom to form MoN2O2 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra and corners with three equivalent Mg(1)N3O tetrahedra. In the second Mo site, Mo(2) is bonded to one N(1), one N(3), one O(2), and one O(3) atom to form MoN2O2 tetrahedra that share  a cornercorner with one Mg(1)N3O tetrahedra and corners with two equivalent Na(1)O4 tetrahedra. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), and one Mo(2) atom to form distorted NNa5Mo octahedra that share  a cornercorner with one O(4)Na3Mo tetrahedra and edges with two equivalent O(3)Na5Mo pentagonal pyramids. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. In the third N site, N(3) is bonded in a 7-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), one Mg(1), and one Mo(2) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. 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(4), one Mg(1), and one Mo(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(6), one Na(8), and one Mo(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(3), one Na(6), one Na(7), and one Mo(2) atom to form distorted ONa5Mo pentagonal pyramids that share corners with three equivalent O(4)Na3Mo tetrahedra and edges with two equivalent N(1)Na5Mo octahedra. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(7), and one Mo(1) atom to form distorted ONa3Mo tetrahedra that share  a cornercorner with one N(1)Na5Mo octahedra and corners with three equivalent O(3)Na5Mo pentagonal pyramids. The corner-sharing octahedral tilt angles are 71°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na8MgMo2(NO)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.018
_cell_length_b   6.103
_cell_length_c   9.313
_cell_angle_alpha   86.539
_cell_angle_beta   71.068
_cell_angle_gamma   67.526
_symmetry_Int_Tables_number   1
_cell_volume   298.160
_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  0.215  0.745  0.986  1.0
  Na  Na1  1  0.732  0.235  0.963  1.0
  Na  Na2  1  0.095  0.758  0.413  1.0
  Na  Na3  1  0.073  0.249  0.602  1.0
  Na  Na4  1  0.497  0.822  0.547  1.0
  Na  Na5  1  0.633  0.207  0.299  1.0
  Na  Na6  1  0.613  0.700  0.174  1.0
  Na  Na7  1  0.284  0.216  0.878  1.0
  Mg  Mg8  1  0.584  0.376  0.627  1.0
  Mo  Mo9  1  0.863  0.749  0.754  1.0
  Mo  Mo10  1  0.124  0.277  0.262  1.0
  N  N11  1  0.312  0.039  0.351  1.0
  N  N12  1  0.206  0.564  0.650  1.0
  N  N13  1  0.819  0.442  0.409  1.0
  N  N14  1  0.701  0.018  0.659  1.0
  O  O15  1  0.667  0.530  0.782  1.0
  O  O16  1  0.040  0.158  0.110  1.0
  O  O17  1  0.322  0.469  0.184  1.0
  O  O18  1  0.812  0.831  0.966  1.0
[/CIF]
.
The structure described by Na8MgMo2(NO)4 crystallizes in the triclinic P1 space group. There are eight 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 tetrahedra that share  a cornercorner with one Mg(1)N3O tetrahedra, corners with two equivalent Mo(1)N2O2 tetrahedra, and corners with two equivalent Mo(2)N2O2 tetrahedra. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(3) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one O(1) atom. In the fifth Na site, Na(5) is bonded in a 4-coordinate geometry to one N(1), one N(2), one N(3), and one N(4) atom. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one N(1), one N(3), one O(2), and one O(3) atom. In the seventh Na site, Na(7) is bonded in a 4-coordinate geometry to one N(1), one N(3), one O(3), and one O(4) atom. In the eighth Na site, Na(8) is bonded in a 2-coordinate geometry to one N(2), one N(4), and one O(2) atom. Mg(1) is bonded to one N(2), one N(3), one N(4), and one O(1) atom to form distorted MgN3O tetrahedra that share  a cornercorner with one Na(1)O4 tetrahedra,  a cornercorner with one Mo(2)N2O2 tetrahedra, and corners with three equivalent Mo(1)N2O2 tetrahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one N(2), one N(4), one O(1), and one O(4) atom to form MoN2O2 tetrahedra that share corners with two equivalent Na(1)O4 tetrahedra and corners with three equivalent Mg(1)N3O tetrahedra. In the second Mo site, Mo(2) is bonded to one N(1), one N(3), one O(2), and one O(3) atom to form MoN2O2 tetrahedra that share  a cornercorner with one Mg(1)N3O tetrahedra and corners with two equivalent Na(1)O4 tetrahedra. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), and one Mo(2) atom to form distorted NNa5Mo octahedra that share  a cornercorner with one O(4)Na3Mo tetrahedra and edges with two equivalent O(3)Na5Mo pentagonal pyramids. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. In the third N site, N(3) is bonded in a 7-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(6), one Na(7), one Mg(1), and one Mo(2) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Na(3), one Na(4), one Na(5), one Na(8), one Mg(1), and one Mo(1) atom. 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(4), one Mg(1), and one Mo(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(6), one Na(8), and one Mo(2) atom. In the third O site, O(3) is bonded to one Na(1), one Na(2), one Na(3), one Na(6), one Na(7), and one Mo(2) atom to form distorted ONa5Mo pentagonal pyramids that share corners with three equivalent O(4)Na3Mo tetrahedra and edges with two equivalent N(1)Na5Mo octahedra. In the fourth O site, O(4) is bonded to one Na(1), one Na(2), one Na(7), and one Mo(1) atom to form distorted ONa3Mo tetrahedra that share  a cornercorner with one N(1)Na5Mo octahedra and corners with three equivalent O(3)Na5Mo pentagonal pyramids. The corner-sharing octahedral tilt angles are 71°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na8MgMo2(NO)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.018
_cell_length_b   6.103
_cell_length_c   9.313
_cell_angle_alpha   86.539
_cell_angle_beta   71.068
_cell_angle_gamma   67.526
_symmetry_Int_Tables_number   1
_cell_volume   298.160
_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  0.215  0.745  0.986  1.0
  Na  Na1  1  0.732  0.235  0.963  1.0
  Na  Na2  1  0.095  0.758  0.413  1.0
  Na  Na3  1  0.073  0.249  0.602  1.0
  Na  Na4  1  0.497  0.822  0.547  1.0
  Na  Na5  1  0.633  0.207  0.299  1.0
  Na  Na6  1  0.613  0.700  0.174  1.0
  Na  Na7  1  0.284  0.216  0.878  1.0
  Mg  Mg8  1  0.584  0.376  0.627  1.0
  Mo  Mo9  1  0.863  0.749  0.754  1.0
  Mo  Mo10  1  0.124  0.277  0.262  1.0
  N  N11  1  0.312  0.039  0.351  1.0
  N  N12  1  0.206  0.564  0.650  1.0
  N  N13  1  0.819  0.442  0.409  1.0
  N  N14  1  0.701  0.018  0.659  1.0
  O  O15  1  0.667  0.530  0.782  1.0
  O  O16  1  0.040  0.158  0.110  1.0
  O  O17  1  0.322  0.469  0.184  1.0
  O  O18  1  0.812  0.831  0.966  1.0
[/CIF]
.