The structure described by K2Na3P3O10 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(3), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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(4) atom to form PO4 tetrahedra that share corners with three equivalent Na(2)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 16-41°. In the second P site, P(2) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form corner-sharing PO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Na(1), one P(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one K(1), two equivalent Na(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Na3P3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.760
_cell_length_b   5.760
_cell_length_c   18.893
_cell_angle_alpha   84.629
_cell_angle_beta   84.629
_cell_angle_gamma   59.340
_symmetry_Int_Tables_number   1
_cell_volume   536.074
_cell_formula_units_Z   2
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
  K  K0  1  0.178  0.633  0.577  1.0
  K  K1  1  0.367  0.822  0.923  1.0
  K  K2  1  0.822  0.367  0.423  1.0
  K  K3  1  0.633  0.178  0.077  1.0
  Na  Na4  1  0.474  0.090  0.328  1.0
  Na  Na5  1  0.910  0.526  0.172  1.0
  Na  Na6  1  0.526  0.910  0.672  1.0
  Na  Na7  1  0.090  0.474  0.828  1.0
  Na  Na8  1  0.500  0.000  0.500  1.0
  Na  Na9  1  0.000  0.500  0.000  1.0
  P  P10  1  0.161  0.703  0.399  1.0
  P  P11  1  0.297  0.839  0.101  1.0
  P  P12  1  0.839  0.297  0.601  1.0
  P  P13  1  0.703  0.161  0.899  1.0
  P  P14  1  0.096  0.904  0.250  1.0
  P  P15  1  0.904  0.096  0.750  1.0
  O  O16  1  0.297  0.849  0.423  1.0
  O  O17  1  0.151  0.703  0.077  1.0
  O  O18  1  0.703  0.151  0.577  1.0
  O  O19  1  0.849  0.297  0.923  1.0
  O  O20  1  0.290  0.408  0.427  1.0
  O  O21  1  0.592  0.710  0.073  1.0
  O  O22  1  0.710  0.592  0.573  1.0
  O  O23  1  0.408  0.290  0.927  1.0
  O  O24  1  0.853  0.862  0.406  1.0
  O  O25  1  0.138  0.147  0.094  1.0
  O  O26  1  0.147  0.138  0.594  1.0
  O  O27  1  0.862  0.853  0.906  1.0
  O  O28  1  0.241  0.668  0.311  1.0
  O  O29  1  0.332  0.759  0.189  1.0
  O  O30  1  0.759  0.332  0.689  1.0
  O  O31  1  0.668  0.241  0.811  1.0
  O  O32  1  0.078  0.163  0.269  1.0
  O  O33  1  0.837  0.922  0.231  1.0
  O  O34  1  0.922  0.837  0.731  1.0
  O  O35  1  0.163  0.078  0.769  1.0
[/CIF]
.
The structure described by K2Na3P3O10 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(3), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. In the second Na site, Na(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NaO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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(4) atom to form PO4 tetrahedra that share corners with three equivalent Na(2)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 16-41°. In the second P site, P(2) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form corner-sharing PO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to three equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent K(1), one Na(1), one Na(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Na(1), one P(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one K(1), two equivalent Na(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Na3P3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.760
_cell_length_b   5.760
_cell_length_c   18.893
_cell_angle_alpha   84.629
_cell_angle_beta   84.629
_cell_angle_gamma   59.340
_symmetry_Int_Tables_number   1
_cell_volume   536.074
_cell_formula_units_Z   2
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
  K  K0  1  0.178  0.633  0.577  1.0
  K  K1  1  0.367  0.822  0.923  1.0
  K  K2  1  0.822  0.367  0.423  1.0
  K  K3  1  0.633  0.178  0.077  1.0
  Na  Na4  1  0.474  0.090  0.328  1.0
  Na  Na5  1  0.910  0.526  0.172  1.0
  Na  Na6  1  0.526  0.910  0.672  1.0
  Na  Na7  1  0.090  0.474  0.828  1.0
  Na  Na8  1  0.500  0.000  0.500  1.0
  Na  Na9  1  0.000  0.500  0.000  1.0
  P  P10  1  0.161  0.703  0.399  1.0
  P  P11  1  0.297  0.839  0.101  1.0
  P  P12  1  0.839  0.297  0.601  1.0
  P  P13  1  0.703  0.161  0.899  1.0
  P  P14  1  0.096  0.904  0.250  1.0
  P  P15  1  0.904  0.096  0.750  1.0
  O  O16  1  0.297  0.849  0.423  1.0
  O  O17  1  0.151  0.703  0.077  1.0
  O  O18  1  0.703  0.151  0.577  1.0
  O  O19  1  0.849  0.297  0.923  1.0
  O  O20  1  0.290  0.408  0.427  1.0
  O  O21  1  0.592  0.710  0.073  1.0
  O  O22  1  0.710  0.592  0.573  1.0
  O  O23  1  0.408  0.290  0.927  1.0
  O  O24  1  0.853  0.862  0.406  1.0
  O  O25  1  0.138  0.147  0.094  1.0
  O  O26  1  0.147  0.138  0.594  1.0
  O  O27  1  0.862  0.853  0.906  1.0
  O  O28  1  0.241  0.668  0.311  1.0
  O  O29  1  0.332  0.759  0.189  1.0
  O  O30  1  0.759  0.332  0.689  1.0
  O  O31  1  0.668  0.241  0.811  1.0
  O  O32  1  0.078  0.163  0.269  1.0
  O  O33  1  0.837  0.922  0.231  1.0
  O  O34  1  0.922  0.837  0.731  1.0
  O  O35  1  0.163  0.078  0.769  1.0
[/CIF]
.