The crystal structure described by Na2Ge2O5 crystallizes in the orthorhombic Pca2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing GeO4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing GeO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Ge(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Na(2), one Ge(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_Na2Ge2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.745
_cell_length_b   8.695
_cell_length_c   9.964
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   497.767
_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  0.936  0.023  0.490  1.0
  Na  Na1  1  0.936  0.523  0.010  1.0
  Na  Na2  1  0.908  0.750  0.743  1.0
  Na  Na3  1  0.908  0.250  0.757  1.0
  Na  Na4  1  0.092  0.250  0.257  1.0
  Na  Na5  1  0.092  0.750  0.243  1.0
  Na  Na6  1  0.064  0.523  0.510  1.0
  Na  Na7  1  0.064  0.023  0.990  1.0
  Ge  Ge8  1  0.634  0.947  0.201  1.0
  Ge  Ge9  1  0.634  0.447  0.299  1.0
  Ge  Ge10  1  0.546  0.750  0.461  1.0
  Ge  Ge11  1  0.546  0.250  0.039  1.0
  Ge  Ge12  1  0.454  0.750  0.961  1.0
  Ge  Ge13  1  0.454  0.250  0.539  1.0
  Ge  Ge14  1  0.366  0.947  0.701  1.0
  Ge  Ge15  1  0.366  0.447  0.799  1.0
  O  O16  1  0.911  0.503  0.259  1.0
  O  O17  1  0.911  0.003  0.241  1.0
  O  O18  1  0.835  0.255  0.997  1.0
  O  O19  1  0.835  0.755  0.503  1.0
  O  O20  1  0.662  0.778  0.094  1.0
  O  O21  1  0.662  0.278  0.406  1.0
  O  O22  1  0.562  0.572  0.891  1.0
  O  O23  1  0.562  0.072  0.609  1.0
  O  O24  1  0.555  0.887  0.836  1.0
  O  O25  1  0.555  0.387  0.664  1.0
  O  O26  1  0.445  0.887  0.336  1.0
  O  O27  1  0.445  0.387  0.164  1.0
  O  O28  1  0.438  0.572  0.391  1.0
  O  O29  1  0.438  0.072  0.109  1.0
  O  O30  1  0.338  0.278  0.906  1.0
  O  O31  1  0.338  0.778  0.594  1.0
  O  O32  1  0.165  0.255  0.497  1.0
  O  O33  1  0.165  0.755  0.003  1.0
  O  O34  1  0.089  0.503  0.759  1.0
  O  O35  1  0.089  0.003  0.741  1.0
[/CIF]
.
The crystal structure described by Na2Ge2O5 crystallizes in the orthorhombic Pca2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing GeO4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing GeO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Na(2), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Ge(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Na(2), one Ge(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_Na2Ge2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.745
_cell_length_b   8.695
_cell_length_c   9.964
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   497.767
_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  0.936  0.023  0.490  1.0
  Na  Na1  1  0.936  0.523  0.010  1.0
  Na  Na2  1  0.908  0.750  0.743  1.0
  Na  Na3  1  0.908  0.250  0.757  1.0
  Na  Na4  1  0.092  0.250  0.257  1.0
  Na  Na5  1  0.092  0.750  0.243  1.0
  Na  Na6  1  0.064  0.523  0.510  1.0
  Na  Na7  1  0.064  0.023  0.990  1.0
  Ge  Ge8  1  0.634  0.947  0.201  1.0
  Ge  Ge9  1  0.634  0.447  0.299  1.0
  Ge  Ge10  1  0.546  0.750  0.461  1.0
  Ge  Ge11  1  0.546  0.250  0.039  1.0
  Ge  Ge12  1  0.454  0.750  0.961  1.0
  Ge  Ge13  1  0.454  0.250  0.539  1.0
  Ge  Ge14  1  0.366  0.947  0.701  1.0
  Ge  Ge15  1  0.366  0.447  0.799  1.0
  O  O16  1  0.911  0.503  0.259  1.0
  O  O17  1  0.911  0.003  0.241  1.0
  O  O18  1  0.835  0.255  0.997  1.0
  O  O19  1  0.835  0.755  0.503  1.0
  O  O20  1  0.662  0.778  0.094  1.0
  O  O21  1  0.662  0.278  0.406  1.0
  O  O22  1  0.562  0.572  0.891  1.0
  O  O23  1  0.562  0.072  0.609  1.0
  O  O24  1  0.555  0.887  0.836  1.0
  O  O25  1  0.555  0.387  0.664  1.0
  O  O26  1  0.445  0.887  0.336  1.0
  O  O27  1  0.445  0.387  0.164  1.0
  O  O28  1  0.438  0.572  0.391  1.0
  O  O29  1  0.438  0.072  0.109  1.0
  O  O30  1  0.338  0.278  0.906  1.0
  O  O31  1  0.338  0.778  0.594  1.0
  O  O32  1  0.165  0.255  0.497  1.0
  O  O33  1  0.165  0.755  0.003  1.0
  O  O34  1  0.089  0.503  0.759  1.0
  O  O35  1  0.089  0.003  0.741  1.0
[/CIF]
.