data_[Na3Li6Er3I18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Li  0.9800  1.4500  0.9000
  Er  1.2400  1.7500  1.0300
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.6534]
_cell_length_b [7.6534]
_cell_length_c [21.1449]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaLi2ErI6]
_chemical_formula_sum '[Na3 Li6 Er3 I18]'
_cell_volume [1072.6271]
_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  3  0.0000  0.0000  0.1820  1.0
  Li  Li1  3  0.0000  0.0000  0.4907  1.0
  Li  Li2  3  0.0000  0.0000  0.9948  1.0
  Er  Er3  3  0.0000  0.0000  0.6736  1.0
  I  I4  9  0.0002  0.3272  0.0812  1.0
  I  I5  9  0.0107  0.6392  0.2513  1.0
]