The crystal structure described by Na2Cu(PO3)4 crystallizes in the monoclinic C2/c space group. Na(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(7) atoms to form distorted NaO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Na(1)O5 trigonal bipyramid. Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. 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(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Na(1)O5 trigonal bipyramids. 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  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Na(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(2) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one P(2) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent P(1) atoms. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. is represented by the CIF file [CIF]
data_Na2Cu(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.259
_cell_length_b   8.259
_cell_length_c   7.910
_cell_angle_alpha   87.020
_cell_angle_beta   87.020
_cell_angle_gamma   109.668
_symmetry_Int_Tables_number   1
_cell_volume   505.956
_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
  Na  Na0  1  0.184  0.471  0.694  1.0
  Na  Na1  1  0.816  0.529  0.306  1.0
  Na  Na2  1  0.471  0.184  0.194  1.0
  Na  Na3  1  0.529  0.816  0.806  1.0
  Cu  Cu4  1  0.137  0.863  0.250  1.0
  Cu  Cu5  1  0.863  0.137  0.750  1.0
  P  P6  1  0.212  0.064  0.823  1.0
  P  P7  1  0.936  0.788  0.677  1.0
  P  P8  1  0.064  0.212  0.323  1.0
  P  P9  1  0.240  0.551  0.125  1.0
  P  P10  1  0.551  0.240  0.625  1.0
  P  P11  1  0.449  0.760  0.375  1.0
  P  P12  1  0.788  0.936  0.177  1.0
  P  P13  1  0.760  0.449  0.875  1.0
  O  O14  1  0.915  0.840  0.160  1.0
  O  O15  1  0.122  0.878  0.750  1.0
  O  O16  1  0.306  0.040  0.973  1.0
  O  O17  1  0.396  0.604  0.250  1.0
  O  O18  1  0.897  0.374  0.815  1.0
  O  O19  1  0.960  0.694  0.527  1.0
  O  O20  1  0.840  0.915  0.660  1.0
  O  O21  1  0.160  0.085  0.340  1.0
  O  O22  1  0.346  0.165  0.663  1.0
  O  O23  1  0.626  0.103  0.685  1.0
  O  O24  1  0.586  0.311  0.445  1.0
  O  O25  1  0.103  0.626  0.185  1.0
  O  O26  1  0.689  0.414  0.055  1.0
  O  O27  1  0.311  0.586  0.945  1.0
  O  O28  1  0.878  0.122  0.250  1.0
  O  O29  1  0.165  0.346  0.163  1.0
  O  O30  1  0.654  0.835  0.337  1.0
  O  O31  1  0.694  0.960  0.027  1.0
  O  O32  1  0.374  0.897  0.315  1.0
  O  O33  1  0.835  0.654  0.837  1.0
  O  O34  1  0.414  0.689  0.555  1.0
  O  O35  1  0.085  0.160  0.840  1.0
  O  O36  1  0.604  0.396  0.750  1.0
  O  O37  1  0.040  0.306  0.473  1.0
[/CIF]
.
The crystal structure described by Na2Cu(PO3)4 crystallizes in the monoclinic C2/c space group. Na(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(7) atoms to form distorted NaO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Na(1)O5 trigonal bipyramid. Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms. 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(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Na(1)O5 trigonal bipyramids. 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  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Na(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(2) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one P(2) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent P(1) atoms. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Cu(1), and one P(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. is represented by the CIF file [CIF]
data_Na2Cu(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.259
_cell_length_b   8.259
_cell_length_c   7.910
_cell_angle_alpha   87.020
_cell_angle_beta   87.020
_cell_angle_gamma   109.668
_symmetry_Int_Tables_number   1
_cell_volume   505.956
_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
  Na  Na0  1  0.184  0.471  0.694  1.0
  Na  Na1  1  0.816  0.529  0.306  1.0
  Na  Na2  1  0.471  0.184  0.194  1.0
  Na  Na3  1  0.529  0.816  0.806  1.0
  Cu  Cu4  1  0.137  0.863  0.250  1.0
  Cu  Cu5  1  0.863  0.137  0.750  1.0
  P  P6  1  0.212  0.064  0.823  1.0
  P  P7  1  0.936  0.788  0.677  1.0
  P  P8  1  0.064  0.212  0.323  1.0
  P  P9  1  0.240  0.551  0.125  1.0
  P  P10  1  0.551  0.240  0.625  1.0
  P  P11  1  0.449  0.760  0.375  1.0
  P  P12  1  0.788  0.936  0.177  1.0
  P  P13  1  0.760  0.449  0.875  1.0
  O  O14  1  0.915  0.840  0.160  1.0
  O  O15  1  0.122  0.878  0.750  1.0
  O  O16  1  0.306  0.040  0.973  1.0
  O  O17  1  0.396  0.604  0.250  1.0
  O  O18  1  0.897  0.374  0.815  1.0
  O  O19  1  0.960  0.694  0.527  1.0
  O  O20  1  0.840  0.915  0.660  1.0
  O  O21  1  0.160  0.085  0.340  1.0
  O  O22  1  0.346  0.165  0.663  1.0
  O  O23  1  0.626  0.103  0.685  1.0
  O  O24  1  0.586  0.311  0.445  1.0
  O  O25  1  0.103  0.626  0.185  1.0
  O  O26  1  0.689  0.414  0.055  1.0
  O  O27  1  0.311  0.586  0.945  1.0
  O  O28  1  0.878  0.122  0.250  1.0
  O  O29  1  0.165  0.346  0.163  1.0
  O  O30  1  0.654  0.835  0.337  1.0
  O  O31  1  0.694  0.960  0.027  1.0
  O  O32  1  0.374  0.897  0.315  1.0
  O  O33  1  0.835  0.654  0.837  1.0
  O  O34  1  0.414  0.689  0.555  1.0
  O  O35  1  0.085  0.160  0.840  1.0
  O  O36  1  0.604  0.396  0.750  1.0
  O  O37  1  0.040  0.306  0.473  1.0
[/CIF]
.