data_[Pm6Al8Si4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.1774]
_cell_length_b [4.2659]
_cell_length_c [8.5129]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.1574]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3(Al2Si)2]
_chemical_formula_sum '[Pm6 Al8 Si4]'
_cell_volume [396.8061]
_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  0.1683  0.5000  0.6631  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Al  Al2  4  0.0511  0.0000  0.3820  1
  Al  Al3  4  0.2259  0.5000  0.0632  1
  Si  Si4  4  0.1114  0.5000  0.2785  1
]