data_[Li21Mg18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.4995]
_cell_length_b [5.4995]
_cell_length_c [30.0302]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Li7Mg6]
_chemical_formula_sum '[Li21 Mg18]'
_cell_volume [786.5658]
_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
[
  Li  Li0  18  0.0063  0.5032  0.4100  1.0
  Li  Li1  3  0.0000  0.0000  0.0000  1.0
  Mg  Mg2  6  0.0000  0.0000  0.1656  1.0
  Mg  Mg3  6  0.0000  0.0000  0.3489  1.0
  Mg  Mg4  6  0.0000  0.0000  0.4519  1.0
]