data_[Na8Ge2O7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ge  2.0100  1.2500  0.7700
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pm]
_cell_length_a [6.0598]
_cell_length_b [6.5499]
_cell_length_c [6.1101]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.7265]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [6]
_chemical_formula_structural [Na8Ge2O7]
_chemical_formula_sum '[Na8 Ge2 O7]'
_cell_volume [242.4936]
_cell_formula_units_Z [1]
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  2  0.1740  0.2488  0.1653  1
  Na  Na1  2  0.8386  0.2471  0.8408  1
  Na  Na2  1  0.1088  0.0000  0.5551  1
  Na  Na3  1  0.4537  0.0000  0.8307  1
  Na  Na4  1  0.5698  0.5000  0.1371  1
  Na  Na5  1  0.8666  0.5000  0.4508  1
  Ge  Ge6  1  0.3348  0.5000  0.6744  1
  Ge  Ge7  1  0.6468  0.0000  0.3206  1
  O  O8  2  0.2117  0.2755  0.7936  1
  O  O9  2  0.8031  0.2209  0.2107  1
  O  O10  1  0.2722  0.5000  0.3894  1
  O  O11  1  0.6177  0.5000  0.7454  1
  O  O12  1  0.7410  0.0000  0.6065  1
]