data_[Na18Sr36Cd3]
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 [R-3]
_cell_length_a [13.3355]
_cell_length_b [13.3355]
_cell_length_c [17.4366]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Na6Sr12Cd]
_chemical_formula_sum '[Na18 Sr36 Cd3]'
_cell_volume [2685.4357]
_cell_formula_units_Z [3]
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  18  0.0399  0.4398  0.7029  1.0
  Sr  Sr1  18  0.0275  0.1822  0.8240  1.0
  Sr  Sr2  18  0.0566  0.8473  0.4083  1.0
  Cd  Cd3  3  0.0000  0.0000  0.0000  1.0
]