data_[Na2Sr16Cd4]
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
  Cd  1.6900  1.5500  1.0900
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [21.0814]
_cell_length_b [5.7393]
_cell_length_c [8.7811]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.5899]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na(Sr4Cd)2]
_chemical_formula_sum '[Na2 Sr16 Cd4]'
_cell_volume [1000.9529]
_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  1.0
  Sr  Sr1  4  0.0356  0.0000  0.7646  1.0
  Sr  Sr2  4  0.0984  0.5000  0.4848  1.0
  Sr  Sr3  4  0.1791  0.5000  0.9565  1.0
  Sr  Sr4  4  0.1939  0.0000  0.3058  1.0
  Cd  Cd5  4  0.1873  0.0000  0.6971  1.0
]