The material described by Na11N7O16 crystallizes in the triclinic P1 space group. There are eleven inequivalent Na sites. In the first Na site, Na(1) is bonded to one N(1), one N(5), one O(11), one O(16), one O(3), one O(4), and two equivalent O(5) atoms to form distorted NaN2O6 hexagonal bipyramids that share corners with two equivalent Na(1)N2O6 hexagonal bipyramids and  a cornercorner with one Na(7)NO4 square pyramid. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one N(1), one O(1), one O(12), one O(13), one O(2), and two equivalent O(6) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(2), and two equivalent O(7) atoms. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one N(1), one N(6), one O(13), one O(6), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 5-coordinate geometry to one N(2), one O(10), one O(5), and two equivalent O(16) atoms. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one N(1), one O(5), one O(8), and two equivalent O(11) atoms. In the seventh Na site, Na(7) is bonded to one N(2), one O(10), one O(14), one O(3), and one O(7) atom to form distorted corner-sharing NaNO4 square pyramids. In the eighth Na site, Na(8) is bonded in a 8-coordinate geometry to one N(3), one N(6), one O(1), one O(2), one O(6), one O(9), and two equivalent O(12) atoms. In the ninth Na site, Na(9) is bonded in a 7-coordinate geometry to one N(5), two equivalent N(1), one O(1), one O(11), one O(13), and two equivalent O(8) atoms. In the tenth Na site, Na(10) is bonded in a 5-coordinate geometry to one O(12), one O(15), one O(2), and two equivalent O(9) atoms. In the eleventh Na site, Na(11) is bonded in a 5-coordinate geometry to one O(14), one O(16), one O(3), and two equivalent O(10) atoms. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(6), and two equivalent Na(9) atoms. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Na(5), one Na(7), one O(3), and one O(4) atom. In the third N site, N(3) is bonded in a distorted bent 120 degrees geometry to one Na(8), one O(2), and one O(9) atom. In the fourth N site, N(4) is bonded in a 2-coordinate geometry to one N(7), one O(14), and one O(15) atom. In the fifth N site, N(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(9), one O(11), and one O(16) atom. In the sixth N site, N(6) is bonded in a 2-coordinate geometry to one Na(4), one Na(8), one O(12), and one O(13) atom. In the seventh N site, N(7) is bonded in a distorted bent 120 degrees geometry to one N(4) and one O(7) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(2), one Na(8), one Na(9), and one O(6) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(10), one Na(2), one Na(3), one Na(8), and one N(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(11), one Na(7), and one N(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one N(2), and one O(5) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Na(5), one Na(6), two equivalent Na(1), and one O(4) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Na(4), one Na(8), two equivalent Na(2), and one O(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(7), two equivalent Na(3), and one N(7) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Na(4), one Na(6), and two equivalent Na(9) atoms. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(8), two equivalent Na(10), and one N(3) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Na(5), one Na(7), and two equivalent Na(11) atoms. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Na(1), one Na(9), two equivalent Na(6), and one N(5) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Na(10), one Na(2), two equivalent Na(8), and one N(6) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Na(2), one Na(4), one Na(9), and one N(6) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(11), one Na(3), one Na(7), and one N(4) atom. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one Na(10), one Na(3), and one N(4) atom. In the sixteenth O site, O(16) is bonded in a 5-coordinate geometry to one Na(1), one Na(11), two equivalent Na(5), and one N(5) atom. is represented by the CIF card [CIF]
data_Na11N7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.822
_cell_length_b   5.669
_cell_length_c   16.962
_cell_angle_alpha   92.700
_cell_angle_beta   93.808
_cell_angle_gamma   91.978
_symmetry_Int_Tables_number   1
_cell_volume   461.815
_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  0.055  0.006  0.000  1.0
  Na  Na1  1  0.041  0.059  0.676  1.0
  Na  Na2  1  0.977  0.026  0.358  1.0
  Na  Na3  1  0.574  0.753  0.740  1.0
  Na  Na4  1  0.553  0.677  0.077  1.0
  Na  Na5  1  0.539  0.209  0.898  1.0
  Na  Na6  1  0.498  0.144  0.235  1.0
  Na  Na7  1  0.582  0.299  0.571  1.0
  Na  Na8  1  0.026  0.509  0.825  1.0
  Na  Na9  1  0.070  0.574  0.489  1.0
  Na  Na10  1  0.039  0.474  0.181  1.0
  N  N11  1  0.913  0.981  0.842  1.0
  N  N12  1  0.834  0.995  0.151  1.0
  N  N13  1  0.616  0.879  0.510  1.0
  N  N14  1  0.256  0.554  0.332  1.0
  N  N15  1  0.088  0.581  0.976  1.0
  N  N16  1  0.203  0.562  0.649  1.0
  N  N17  1  0.486  0.658  0.312  1.0
  O  O18  1  0.647  0.231  0.724  1.0
  O  O19  1  0.871  0.955  0.512  1.0
  O  O20  1  0.090  0.024  0.159  1.0
  O  O21  1  0.713  0.166  0.075  1.0
  O  O22  1  0.547  0.025  0.017  1.0
  O  O23  1  0.518  0.059  0.667  1.0
  O  O24  1  0.503  0.887  0.331  1.0
  O  O25  1  0.530  0.545  0.840  1.0
  O  O26  1  0.583  0.654  0.509  1.0
  O  O27  1  0.545  0.492  0.185  1.0
  O  O28  1  0.105  0.367  0.952  1.0
  O  O29  1  0.102  0.389  0.602  1.0
  O  O30  1  0.028  0.656  0.692  1.0
  O  O31  1  0.209  0.328  0.314  1.0
  O  O32  1  0.068  0.662  0.369  1.0
  O  O33  1  0.039  0.615  0.049  1.0
[/CIF]
.
The material described by Na11N7O16 crystallizes in the triclinic P1 space group. There are eleven inequivalent Na sites. In the first Na site, Na(1) is bonded to one N(1), one N(5), one O(11), one O(16), one O(3), one O(4), and two equivalent O(5) atoms to form distorted NaN2O6 hexagonal bipyramids that share corners with two equivalent Na(1)N2O6 hexagonal bipyramids and  a cornercorner with one Na(7)NO4 square pyramid. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one N(1), one O(1), one O(12), one O(13), one O(2), and two equivalent O(6) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(2), and two equivalent O(7) atoms. In the fourth Na site, Na(4) is bonded in a 5-coordinate geometry to one N(1), one N(6), one O(13), one O(6), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 5-coordinate geometry to one N(2), one O(10), one O(5), and two equivalent O(16) atoms. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one N(1), one O(5), one O(8), and two equivalent O(11) atoms. In the seventh Na site, Na(7) is bonded to one N(2), one O(10), one O(14), one O(3), and one O(7) atom to form distorted corner-sharing NaNO4 square pyramids. In the eighth Na site, Na(8) is bonded in a 8-coordinate geometry to one N(3), one N(6), one O(1), one O(2), one O(6), one O(9), and two equivalent O(12) atoms. In the ninth Na site, Na(9) is bonded in a 7-coordinate geometry to one N(5), two equivalent N(1), one O(1), one O(11), one O(13), and two equivalent O(8) atoms. In the tenth Na site, Na(10) is bonded in a 5-coordinate geometry to one O(12), one O(15), one O(2), and two equivalent O(9) atoms. In the eleventh Na site, Na(11) is bonded in a 5-coordinate geometry to one O(14), one O(16), one O(3), and two equivalent O(10) atoms. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(4), one Na(6), and two equivalent Na(9) atoms. In the second N site, N(2) is bonded in a 4-coordinate geometry to one Na(5), one Na(7), one O(3), and one O(4) atom. In the third N site, N(3) is bonded in a distorted bent 120 degrees geometry to one Na(8), one O(2), and one O(9) atom. In the fourth N site, N(4) is bonded in a 2-coordinate geometry to one N(7), one O(14), and one O(15) atom. In the fifth N site, N(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(9), one O(11), and one O(16) atom. In the sixth N site, N(6) is bonded in a 2-coordinate geometry to one Na(4), one Na(8), one O(12), and one O(13) atom. In the seventh N site, N(7) is bonded in a distorted bent 120 degrees geometry to one N(4) and one O(7) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(2), one Na(8), one Na(9), and one O(6) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(10), one Na(2), one Na(3), one Na(8), and one N(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(11), one Na(7), and one N(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one N(2), and one O(5) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Na(5), one Na(6), two equivalent Na(1), and one O(4) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Na(4), one Na(8), two equivalent Na(2), and one O(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(7), two equivalent Na(3), and one N(7) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Na(4), one Na(6), and two equivalent Na(9) atoms. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(8), two equivalent Na(10), and one N(3) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Na(5), one Na(7), and two equivalent Na(11) atoms. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Na(1), one Na(9), two equivalent Na(6), and one N(5) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Na(10), one Na(2), two equivalent Na(8), and one N(6) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Na(2), one Na(4), one Na(9), and one N(6) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(11), one Na(3), one Na(7), and one N(4) atom. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one Na(10), one Na(3), and one N(4) atom. In the sixteenth O site, O(16) is bonded in a 5-coordinate geometry to one Na(1), one Na(11), two equivalent Na(5), and one N(5) atom. is represented by the CIF card [CIF]
data_Na11N7O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.822
_cell_length_b   5.669
_cell_length_c   16.962
_cell_angle_alpha   92.700
_cell_angle_beta   93.808
_cell_angle_gamma   91.978
_symmetry_Int_Tables_number   1
_cell_volume   461.815
_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  0.055  0.006  0.000  1.0
  Na  Na1  1  0.041  0.059  0.676  1.0
  Na  Na2  1  0.977  0.026  0.358  1.0
  Na  Na3  1  0.574  0.753  0.740  1.0
  Na  Na4  1  0.553  0.677  0.077  1.0
  Na  Na5  1  0.539  0.209  0.898  1.0
  Na  Na6  1  0.498  0.144  0.235  1.0
  Na  Na7  1  0.582  0.299  0.571  1.0
  Na  Na8  1  0.026  0.509  0.825  1.0
  Na  Na9  1  0.070  0.574  0.489  1.0
  Na  Na10  1  0.039  0.474  0.181  1.0
  N  N11  1  0.913  0.981  0.842  1.0
  N  N12  1  0.834  0.995  0.151  1.0
  N  N13  1  0.616  0.879  0.510  1.0
  N  N14  1  0.256  0.554  0.332  1.0
  N  N15  1  0.088  0.581  0.976  1.0
  N  N16  1  0.203  0.562  0.649  1.0
  N  N17  1  0.486  0.658  0.312  1.0
  O  O18  1  0.647  0.231  0.724  1.0
  O  O19  1  0.871  0.955  0.512  1.0
  O  O20  1  0.090  0.024  0.159  1.0
  O  O21  1  0.713  0.166  0.075  1.0
  O  O22  1  0.547  0.025  0.017  1.0
  O  O23  1  0.518  0.059  0.667  1.0
  O  O24  1  0.503  0.887  0.331  1.0
  O  O25  1  0.530  0.545  0.840  1.0
  O  O26  1  0.583  0.654  0.509  1.0
  O  O27  1  0.545  0.492  0.185  1.0
  O  O28  1  0.105  0.367  0.952  1.0
  O  O29  1  0.102  0.389  0.602  1.0
  O  O30  1  0.028  0.656  0.692  1.0
  O  O31  1  0.209  0.328  0.314  1.0
  O  O32  1  0.068  0.662  0.369  1.0
  O  O33  1  0.039  0.615  0.049  1.0
[/CIF]
.