The structure described by NaGaP2O7 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. Ga(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form GaO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)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(7) atom to form PO4 tetrahedra that share corners with three equivalent Ga(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-54°. In the second P site, P(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Ga(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-51°. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one P(2) atom. In the second O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one P(2) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one P(1), and one P(2) atom. In the fifth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the seventh O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(2) atom. is represented by the CIF file [CIF]
data_NaGaP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.923
_cell_length_b   7.374
_cell_length_c   9.574
_cell_angle_alpha   67.844
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   518.080
_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  0.525  0.710  0.297  1.0
  Na  Na1  1  0.475  0.290  0.703  1.0
  Na  Na2  1  0.025  0.290  0.203  1.0
  Na  Na3  1  0.975  0.710  0.797  1.0
  Ga  Ga4  1  0.993  0.742  0.249  1.0
  Ga  Ga5  1  0.007  0.258  0.751  1.0
  Ga  Ga6  1  0.493  0.258  0.251  1.0
  Ga  Ga7  1  0.507  0.742  0.749  1.0
  P  P8  1  0.290  0.672  0.046  1.0
  P  P9  1  0.710  0.328  0.954  1.0
  P  P10  1  0.790  0.328  0.454  1.0
  P  P11  1  0.210  0.672  0.546  1.0
  P  P12  1  0.746  0.926  0.456  1.0
  P  P13  1  0.254  0.074  0.544  1.0
  P  P14  1  0.246  0.074  0.044  1.0
  P  P15  1  0.754  0.926  0.956  1.0
  O  O16  1  0.348  0.877  0.060  1.0
  O  O17  1  0.652  0.123  0.940  1.0
  O  O18  1  0.848  0.123  0.440  1.0
  O  O19  1  0.152  0.877  0.560  1.0
  O  O20  1  0.916  0.470  0.349  1.0
  O  O21  1  0.084  0.530  0.651  1.0
  O  O22  1  0.416  0.530  0.151  1.0
  O  O23  1  0.584  0.470  0.849  1.0
  O  O24  1  0.606  0.364  0.397  1.0
  O  O25  1  0.394  0.636  0.603  1.0
  O  O26  1  0.106  0.636  0.103  1.0
  O  O27  1  0.894  0.364  0.897  1.0
  O  O28  1  0.867  0.815  0.394  1.0
  O  O29  1  0.133  0.185  0.606  1.0
  O  O30  1  0.367  0.185  0.106  1.0
  O  O31  1  0.633  0.815  0.894  1.0
  O  O32  1  0.787  0.809  0.123  1.0
  O  O33  1  0.213  0.191  0.877  1.0
  O  O34  1  0.287  0.191  0.377  1.0
  O  O35  1  0.713  0.809  0.623  1.0
  O  O36  1  0.584  0.989  0.361  1.0
  O  O37  1  0.416  0.011  0.639  1.0
  O  O38  1  0.084  0.011  0.139  1.0
  O  O39  1  0.916  0.989  0.861  1.0
  O  O40  1  0.703  0.307  0.119  1.0
  O  O41  1  0.297  0.693  0.881  1.0
  O  O42  1  0.203  0.693  0.381  1.0
  O  O43  1  0.797  0.307  0.619  1.0
[/CIF]
.
The structure described by NaGaP2O7 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. Ga(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form GaO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)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(7) atom to form PO4 tetrahedra that share corners with three equivalent Ga(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 32-54°. In the second P site, P(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Ga(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-51°. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one P(2) atom. In the second O site, O(6) is bonded in a distorted trigonal planar geometry to one Na(1), one Ga(1), and one P(2) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one P(1), and one P(2) atom. In the fifth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one P(1) atom. In the seventh O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(2) atom. is represented by the CIF file [CIF]
data_NaGaP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.923
_cell_length_b   7.374
_cell_length_c   9.574
_cell_angle_alpha   67.844
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   518.080
_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  0.525  0.710  0.297  1.0
  Na  Na1  1  0.475  0.290  0.703  1.0
  Na  Na2  1  0.025  0.290  0.203  1.0
  Na  Na3  1  0.975  0.710  0.797  1.0
  Ga  Ga4  1  0.993  0.742  0.249  1.0
  Ga  Ga5  1  0.007  0.258  0.751  1.0
  Ga  Ga6  1  0.493  0.258  0.251  1.0
  Ga  Ga7  1  0.507  0.742  0.749  1.0
  P  P8  1  0.290  0.672  0.046  1.0
  P  P9  1  0.710  0.328  0.954  1.0
  P  P10  1  0.790  0.328  0.454  1.0
  P  P11  1  0.210  0.672  0.546  1.0
  P  P12  1  0.746  0.926  0.456  1.0
  P  P13  1  0.254  0.074  0.544  1.0
  P  P14  1  0.246  0.074  0.044  1.0
  P  P15  1  0.754  0.926  0.956  1.0
  O  O16  1  0.348  0.877  0.060  1.0
  O  O17  1  0.652  0.123  0.940  1.0
  O  O18  1  0.848  0.123  0.440  1.0
  O  O19  1  0.152  0.877  0.560  1.0
  O  O20  1  0.916  0.470  0.349  1.0
  O  O21  1  0.084  0.530  0.651  1.0
  O  O22  1  0.416  0.530  0.151  1.0
  O  O23  1  0.584  0.470  0.849  1.0
  O  O24  1  0.606  0.364  0.397  1.0
  O  O25  1  0.394  0.636  0.603  1.0
  O  O26  1  0.106  0.636  0.103  1.0
  O  O27  1  0.894  0.364  0.897  1.0
  O  O28  1  0.867  0.815  0.394  1.0
  O  O29  1  0.133  0.185  0.606  1.0
  O  O30  1  0.367  0.185  0.106  1.0
  O  O31  1  0.633  0.815  0.894  1.0
  O  O32  1  0.787  0.809  0.123  1.0
  O  O33  1  0.213  0.191  0.877  1.0
  O  O34  1  0.287  0.191  0.377  1.0
  O  O35  1  0.713  0.809  0.623  1.0
  O  O36  1  0.584  0.989  0.361  1.0
  O  O37  1  0.416  0.011  0.639  1.0
  O  O38  1  0.084  0.011  0.139  1.0
  O  O39  1  0.916  0.989  0.861  1.0
  O  O40  1  0.703  0.307  0.119  1.0
  O  O41  1  0.297  0.693  0.881  1.0
  O  O42  1  0.203  0.693  0.381  1.0
  O  O43  1  0.797  0.307  0.619  1.0
[/CIF]
.