data_[Pm20Ag8Sn4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.3024]
_cell_length_b [8.3024]
_cell_length_c [13.5241]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [Pm5Ag2Sn]
_chemical_formula_sum '[Pm20 Ag8 Sn4]'
_cell_volume [932.2167]
_cell_formula_units_Z [4]
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  16  0.1564  0.3436  0.6490  1
  Pm  Pm1  4  0.0000  0.0000  0.0000  1
  Ag  Ag2  8  0.1314  0.6314  0.5000  1
  Sn  Sn3  4  0.0000  0.0000  0.2500  1
]