The crystal structure described by Na3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Na(3)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. In the second Na site, Na(2) is bonded to one O(3), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(3)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-71°. In the third Na site, Na(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted NaO6 octahedra that share  a cornercorner with one Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Na(2)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-71°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-60°. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Na(1)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(2) atom. In the second O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(2) atom. In the third O site, O(6) is bonded in a rectangular see-saw-like geometry to one Na(1), two equivalent Na(2), and one P(2) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one Na(3) atom. In the sixth O site, O(1) is bonded to one Na(3), two equivalent Na(2), and one P(1) atom to form distorted corner-sharing ONa3P tetrahedra. In the seventh O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(1) atom. In the eighth O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(3), and one P(1) atom. is represented by the CIF card [CIF]
data_Na3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.012
_cell_length_b   9.459
_cell_length_c   13.272
_cell_angle_alpha   54.592
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   717.468
_cell_formula_units_Z   4
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  0.849  0.334  0.733  1.0
  Na  Na1  1  0.651  0.334  0.233  1.0
  Na  Na2  1  0.151  0.666  0.267  1.0
  Na  Na3  1  0.349  0.666  0.767  1.0
  Na  Na4  1  0.877  0.997  0.248  1.0
  Na  Na5  1  0.623  0.997  0.748  1.0
  Na  Na6  1  0.123  0.003  0.752  1.0
  Na  Na7  1  0.377  0.003  0.252  1.0
  Na  Na8  1  0.643  0.707  0.561  1.0
  Na  Na9  1  0.857  0.707  0.061  1.0
  Na  Na10  1  0.357  0.293  0.439  1.0
  Na  Na11  1  0.143  0.293  0.939  1.0
  P  P12  1  0.335  0.337  0.676  1.0
  P  P13  1  0.165  0.337  0.176  1.0
  P  P14  1  0.665  0.663  0.324  1.0
  P  P15  1  0.835  0.663  0.824  1.0
  P  P16  1  0.156  0.684  0.515  1.0
  P  P17  1  0.344  0.684  0.015  1.0
  P  P18  1  0.844  0.316  0.485  1.0
  P  P19  1  0.656  0.316  0.985  1.0
  O  O20  1  0.382  0.207  0.646  1.0
  O  O21  1  0.118  0.207  0.146  1.0
  O  O22  1  0.618  0.793  0.354  1.0
  O  O23  1  0.882  0.793  0.854  1.0
  O  O24  1  0.517  0.399  0.705  1.0
  O  O25  1  0.983  0.399  0.205  1.0
  O  O26  1  0.483  0.601  0.295  1.0
  O  O27  1  0.017  0.601  0.795  1.0
  O  O28  1  0.179  0.274  0.772  1.0
  O  O29  1  0.321  0.274  0.272  1.0
  O  O30  1  0.821  0.726  0.228  1.0
  O  O31  1  0.679  0.726  0.728  1.0
  O  O32  1  0.967  0.631  0.586  1.0
  O  O33  1  0.533  0.631  0.086  1.0
  O  O34  1  0.033  0.369  0.414  1.0
  O  O35  1  0.467  0.369  0.914  1.0
  O  O36  1  0.305  0.758  0.560  1.0
  O  O37  1  0.195  0.758  0.060  1.0
  O  O38  1  0.695  0.242  0.440  1.0
  O  O39  1  0.805  0.242  0.940  1.0
  O  O40  1  0.126  0.798  0.376  1.0
  O  O41  1  0.374  0.798  0.876  1.0
  O  O42  1  0.874  0.202  0.624  1.0
  O  O43  1  0.626  0.202  0.124  1.0
  O  O44  1  0.256  0.508  0.543  1.0
  O  O45  1  0.244  0.508  0.043  1.0
  O  O46  1  0.744  0.492  0.457  1.0
  O  O47  1  0.756  0.492  0.957  1.0
  O  O48  1  0.778  0.028  0.428  1.0
  O  O49  1  0.722  0.028  0.928  1.0
  O  O50  1  0.222  0.972  0.572  1.0
  O  O51  1  0.278  0.972  0.072  1.0
[/CIF]
.
The crystal structure described by Na3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form distorted NaO6 octahedra that share  a cornercorner with one Na(3)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Na(2)O6 octahedra, and edges with two equivalent Na(3)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. In the second Na site, Na(2) is bonded to one O(3), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted NaO6 octahedra that share corners with two equivalent Na(3)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Na(3)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-71°. In the third Na site, Na(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form distorted NaO6 octahedra that share  a cornercorner with one Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Na(2)O6 octahedra, and edges with two equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-71°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra, corners with two equivalent Na(1)O6 octahedra, corners with three equivalent Na(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-60°. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Na(3)O6 octahedra, corners with three equivalent Na(1)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-63°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(2) atom. In the second O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(2) atom. In the third O site, O(6) is bonded in a rectangular see-saw-like geometry to one Na(1), two equivalent Na(2), and one P(2) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(8) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one Na(3) atom. In the sixth O site, O(1) is bonded to one Na(3), two equivalent Na(2), and one P(1) atom to form distorted corner-sharing ONa3P tetrahedra. In the seventh O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one P(1) atom. In the eighth O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(3), and one P(1) atom. is represented by the CIF card [CIF]
data_Na3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.012
_cell_length_b   9.459
_cell_length_c   13.272
_cell_angle_alpha   54.592
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   717.468
_cell_formula_units_Z   4
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  0.849  0.334  0.733  1.0
  Na  Na1  1  0.651  0.334  0.233  1.0
  Na  Na2  1  0.151  0.666  0.267  1.0
  Na  Na3  1  0.349  0.666  0.767  1.0
  Na  Na4  1  0.877  0.997  0.248  1.0
  Na  Na5  1  0.623  0.997  0.748  1.0
  Na  Na6  1  0.123  0.003  0.752  1.0
  Na  Na7  1  0.377  0.003  0.252  1.0
  Na  Na8  1  0.643  0.707  0.561  1.0
  Na  Na9  1  0.857  0.707  0.061  1.0
  Na  Na10  1  0.357  0.293  0.439  1.0
  Na  Na11  1  0.143  0.293  0.939  1.0
  P  P12  1  0.335  0.337  0.676  1.0
  P  P13  1  0.165  0.337  0.176  1.0
  P  P14  1  0.665  0.663  0.324  1.0
  P  P15  1  0.835  0.663  0.824  1.0
  P  P16  1  0.156  0.684  0.515  1.0
  P  P17  1  0.344  0.684  0.015  1.0
  P  P18  1  0.844  0.316  0.485  1.0
  P  P19  1  0.656  0.316  0.985  1.0
  O  O20  1  0.382  0.207  0.646  1.0
  O  O21  1  0.118  0.207  0.146  1.0
  O  O22  1  0.618  0.793  0.354  1.0
  O  O23  1  0.882  0.793  0.854  1.0
  O  O24  1  0.517  0.399  0.705  1.0
  O  O25  1  0.983  0.399  0.205  1.0
  O  O26  1  0.483  0.601  0.295  1.0
  O  O27  1  0.017  0.601  0.795  1.0
  O  O28  1  0.179  0.274  0.772  1.0
  O  O29  1  0.321  0.274  0.272  1.0
  O  O30  1  0.821  0.726  0.228  1.0
  O  O31  1  0.679  0.726  0.728  1.0
  O  O32  1  0.967  0.631  0.586  1.0
  O  O33  1  0.533  0.631  0.086  1.0
  O  O34  1  0.033  0.369  0.414  1.0
  O  O35  1  0.467  0.369  0.914  1.0
  O  O36  1  0.305  0.758  0.560  1.0
  O  O37  1  0.195  0.758  0.060  1.0
  O  O38  1  0.695  0.242  0.440  1.0
  O  O39  1  0.805  0.242  0.940  1.0
  O  O40  1  0.126  0.798  0.376  1.0
  O  O41  1  0.374  0.798  0.876  1.0
  O  O42  1  0.874  0.202  0.624  1.0
  O  O43  1  0.626  0.202  0.124  1.0
  O  O44  1  0.256  0.508  0.543  1.0
  O  O45  1  0.244  0.508  0.043  1.0
  O  O46  1  0.744  0.492  0.457  1.0
  O  O47  1  0.756  0.492  0.957  1.0
  O  O48  1  0.778  0.028  0.428  1.0
  O  O49  1  0.722  0.028  0.928  1.0
  O  O50  1  0.222  0.972  0.572  1.0
  O  O51  1  0.278  0.972  0.072  1.0
[/CIF]
.