data_[Nd18Mg3Al3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Mg  1.3100  1.5000  0.8600
  Al  1.6100  1.2500  0.6750
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [9.1500]
_cell_length_b [9.1500]
_cell_length_c [10.5044]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Nd6MgAl]
_chemical_formula_sum '[Nd18 Mg3 Al3]'
_cell_volume [761.6306]
_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
[
  Nd  Nd0  18  0.0197  0.7693  0.2232  1
  Mg  Mg1  3  0.0000  0.0000  0.5000  1
  Al  Al2  3  0.0000  0.0000  0.0000  1
]