data_[Na4Sr4Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [7.1813]
_cell_length_b [4.7299]
_cell_length_c [12.7103]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [NaSrGe2]
_chemical_formula_sum '[Na4 Sr4 Ge8]'
_cell_volume [431.7276]
_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  4  0.1531  0.2500  0.5478  1.0
  Sr  Sr1  4  0.1517  0.2500  0.8387  1.0
  Ge  Ge2  4  0.0218  0.2500  0.3281  1.0
  Ge  Ge3  4  0.1701  0.2500  0.1480  1.0
]