data_[Pm4Mg4Al2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  Al  1.6100  1.2500  0.6750
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [4.9525]
_cell_length_b [15.7489]
_cell_length_c [3.3341]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Pm2Mg2Al]
_chemical_formula_sum '[Pm4 Mg4 Al2]'
_cell_volume [260.0498]
_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
[
  Pm  Pm0  4  0.0000  0.3953  0.5000  1
  Mg  Mg1  4  0.0000  0.1998  0.0000  1
  Al  Al2  2  0.0000  0.0000  0.0000  1
]