data_[Na24Sr16]
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
]
_symmetry_space_group_name_H-M [Fdd2]
_cell_length_a [12.8106]
_cell_length_b [18.6760]
_cell_length_c [7.3696]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [43]
_chemical_formula_structural [Na3Sr2]
_chemical_formula_sum '[Na24 Sr16]'
_cell_volume [1763.1669]
_cell_formula_units_Z [8]
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  16  0.0705  0.1176  0.7448  1
  Na  Na1  8  0.0000  0.0000  0.4062  1
  Sr  Sr2  16  0.0747  0.1983  0.2373  1
]