data_[Na2Sn12Ge2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [6.6053]
_cell_length_b [10.2657]
_cell_length_c [6.3906]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.0541]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSn6Ge]
_chemical_formula_sum '[Na2 Sn12 Ge2]'
_cell_volume [422.1330]
_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  2  0.0000  0.5000  0.0000  1
  Sn  Sn1  8  0.1195  0.2194  0.7555  1
  Sn  Sn2  4  0.2400  0.5000  0.5537  1
  Ge  Ge3  2  0.0000  0.0000  0.0000  1
]