data_[Na2Ca2Sm2I12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  Sm  1.1700  1.8500  1.2290
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P-31c]
_cell_length_a [7.9114]
_cell_length_b [7.9114]
_cell_length_c [14.5357]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [163]
_chemical_formula_structural [NaCaSmI6]
_chemical_formula_sum '[Na2 Ca2 Sm2 I12]'
_cell_volume [787.8961]
_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  0.0000  0.0000  1.0
  Ca  Ca1  2  0.3333  0.6667  0.7500  1.0
  Sm  Sm2  2  0.3333  0.6667  0.2500  1.0
  I  I3  12  0.0049  0.3526  0.1275  1.0
]