data_[Pm20Sn8Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sn  1.9600  1.4500  0.8300
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [17.1687]
_cell_length_b [9.3391]
_cell_length_c [6.5013]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Pm5(SnGe)2]
_chemical_formula_sum '[Pm20 Sn8 Ge8]'
_cell_volume [1042.4247]
_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  8  0.0670  0.2281  0.7781  1
  Pm  Pm1  8  0.1494  0.6271  0.5193  1
  Pm  Pm2  4  0.2500  0.0568  0.5138  1
  Sn  Sn3  8  0.0783  0.5648  0.9946  1
  Ge  Ge4  4  0.0000  0.0000  0.0622  1
  Ge  Ge5  4  0.2500  0.1307  0.0040  1
]