The material described by Na2GeO10 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one O(9) atom. Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one O(1) atom. In the second O site, O(7) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one O(5) atom. In the third O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one O(8) atom. In the fourth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Ge(1), and one O(6) atom. In the fifth O site, O(9) is bonded in a T-shaped geometry to one Na(1), one Na(2), and one O(5) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one Ge(1) atom. In the seventh O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one O(3), and one O(4) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one Ge(1) and one O(10) atom. In the ninth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one O(10) atom. In the tenth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one O(7), and one O(9) atom. is represented by the CIF card [CIF]
data_Na2GeO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.600
_cell_length_b   9.825
_cell_length_c   16.776
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.084
_symmetry_Int_Tables_number   1
_cell_volume   829.072
_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  0.647  0.295  0.218  1.0
  Na  Na1  1  0.353  0.205  0.718  1.0
  Na  Na2  1  0.353  0.705  0.782  1.0
  Na  Na3  1  0.647  0.795  0.282  1.0
  Na  Na4  1  0.882  0.411  0.395  1.0
  Na  Na5  1  0.118  0.089  0.895  1.0
  Na  Na6  1  0.118  0.589  0.605  1.0
  Na  Na7  1  0.882  0.911  0.105  1.0
  Ge  Ge8  1  0.775  0.388  0.915  1.0
  Ge  Ge9  1  0.225  0.112  0.415  1.0
  Ge  Ge10  1  0.225  0.612  0.085  1.0
  Ge  Ge11  1  0.775  0.888  0.585  1.0
  O  O12  1  0.081  0.358  0.888  1.0
  O  O13  1  0.919  0.142  0.388  1.0
  O  O14  1  0.919  0.642  0.112  1.0
  O  O15  1  0.081  0.858  0.612  1.0
  O  O16  1  0.519  0.263  0.861  1.0
  O  O17  1  0.481  0.237  0.361  1.0
  O  O18  1  0.481  0.737  0.139  1.0
  O  O19  1  0.519  0.763  0.639  1.0
  O  O20  1  0.827  0.585  0.909  1.0
  O  O21  1  0.173  0.915  0.409  1.0
  O  O22  1  0.173  0.415  0.091  1.0
  O  O23  1  0.827  0.085  0.591  1.0
  O  O24  1  0.752  0.363  0.027  1.0
  O  O25  1  0.248  0.137  0.527  1.0
  O  O26  1  0.248  0.637  0.973  1.0
  O  O27  1  0.752  0.863  0.473  1.0
  O  O28  1  0.686  0.003  0.787  1.0
  O  O29  1  0.314  0.497  0.287  1.0
  O  O30  1  0.314  0.997  0.213  1.0
  O  O31  1  0.686  0.503  0.713  1.0
  O  O32  1  0.190  0.432  0.821  1.0
  O  O33  1  0.810  0.068  0.321  1.0
  O  O34  1  0.810  0.568  0.179  1.0
  O  O35  1  0.190  0.932  0.679  1.0
  O  O36  1  0.927  0.617  0.726  1.0
  O  O37  1  0.073  0.883  0.226  1.0
  O  O38  1  0.073  0.383  0.274  1.0
  O  O39  1  0.927  0.117  0.774  1.0
  O  O40  1  0.605  0.993  0.000  1.0
  O  O41  1  0.395  0.507  0.500  1.0
  O  O42  1  0.395  0.007  1.000  1.0
  O  O43  1  0.605  0.493  0.500  1.0
  O  O44  1  0.318  0.591  0.349  1.0
  O  O45  1  0.682  0.909  0.849  1.0
  O  O46  1  0.682  0.409  0.651  1.0
  O  O47  1  0.318  0.091  0.151  1.0
  O  O48  1  0.095  0.704  0.937  1.0
  O  O49  1  0.905  0.796  0.437  1.0
  O  O50  1  0.905  0.296  0.063  1.0
  O  O51  1  0.095  0.204  0.563  1.0
[/CIF]
.
The material described by Na2GeO10 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(7), one O(8), and one O(9) atom. Ge(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Na(1) and one O(1) atom. In the second O site, O(7) is bonded in a distorted T-shaped geometry to one Na(1), one Na(2), and one O(5) atom. In the third O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Na(2) and one O(8) atom. In the fourth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Ge(1), and one O(6) atom. In the fifth O site, O(9) is bonded in a T-shaped geometry to one Na(1), one Na(2), and one O(5) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one Ge(1) atom. In the seventh O site, O(10) is bonded in a 3-coordinate geometry to one Na(1), one O(3), and one O(4) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one Ge(1) and one O(10) atom. In the ninth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one O(10) atom. In the tenth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one O(7), and one O(9) atom. is represented by the CIF card [CIF]
data_Na2GeO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.600
_cell_length_b   9.825
_cell_length_c   16.776
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.084
_symmetry_Int_Tables_number   1
_cell_volume   829.072
_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  0.647  0.295  0.218  1.0
  Na  Na1  1  0.353  0.205  0.718  1.0
  Na  Na2  1  0.353  0.705  0.782  1.0
  Na  Na3  1  0.647  0.795  0.282  1.0
  Na  Na4  1  0.882  0.411  0.395  1.0
  Na  Na5  1  0.118  0.089  0.895  1.0
  Na  Na6  1  0.118  0.589  0.605  1.0
  Na  Na7  1  0.882  0.911  0.105  1.0
  Ge  Ge8  1  0.775  0.388  0.915  1.0
  Ge  Ge9  1  0.225  0.112  0.415  1.0
  Ge  Ge10  1  0.225  0.612  0.085  1.0
  Ge  Ge11  1  0.775  0.888  0.585  1.0
  O  O12  1  0.081  0.358  0.888  1.0
  O  O13  1  0.919  0.142  0.388  1.0
  O  O14  1  0.919  0.642  0.112  1.0
  O  O15  1  0.081  0.858  0.612  1.0
  O  O16  1  0.519  0.263  0.861  1.0
  O  O17  1  0.481  0.237  0.361  1.0
  O  O18  1  0.481  0.737  0.139  1.0
  O  O19  1  0.519  0.763  0.639  1.0
  O  O20  1  0.827  0.585  0.909  1.0
  O  O21  1  0.173  0.915  0.409  1.0
  O  O22  1  0.173  0.415  0.091  1.0
  O  O23  1  0.827  0.085  0.591  1.0
  O  O24  1  0.752  0.363  0.027  1.0
  O  O25  1  0.248  0.137  0.527  1.0
  O  O26  1  0.248  0.637  0.973  1.0
  O  O27  1  0.752  0.863  0.473  1.0
  O  O28  1  0.686  0.003  0.787  1.0
  O  O29  1  0.314  0.497  0.287  1.0
  O  O30  1  0.314  0.997  0.213  1.0
  O  O31  1  0.686  0.503  0.713  1.0
  O  O32  1  0.190  0.432  0.821  1.0
  O  O33  1  0.810  0.068  0.321  1.0
  O  O34  1  0.810  0.568  0.179  1.0
  O  O35  1  0.190  0.932  0.679  1.0
  O  O36  1  0.927  0.617  0.726  1.0
  O  O37  1  0.073  0.883  0.226  1.0
  O  O38  1  0.073  0.383  0.274  1.0
  O  O39  1  0.927  0.117  0.774  1.0
  O  O40  1  0.605  0.993  0.000  1.0
  O  O41  1  0.395  0.507  0.500  1.0
  O  O42  1  0.395  0.007  1.000  1.0
  O  O43  1  0.605  0.493  0.500  1.0
  O  O44  1  0.318  0.591  0.349  1.0
  O  O45  1  0.682  0.909  0.849  1.0
  O  O46  1  0.682  0.409  0.651  1.0
  O  O47  1  0.318  0.091  0.151  1.0
  O  O48  1  0.095  0.704  0.937  1.0
  O  O49  1  0.905  0.796  0.437  1.0
  O  O50  1  0.905  0.296  0.063  1.0
  O  O51  1  0.095  0.204  0.563  1.0
[/CIF]
.