data_[Pm12Si4Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [11.9015]
_cell_length_b [4.1789]
_cell_length_c [11.9316]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Pm3SiGe2]
_chemical_formula_sum '[Pm12 Si4 Ge8]'
_cell_volume [593.4240]
_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  4  0.0611  0.2500  0.6220  1
  Pm  Pm1  4  0.1161  0.7500  0.0558  1
  Pm  Pm2  4  0.2092  0.2500  0.2931  1
  Si  Si3  4  0.1316  0.2500  0.8711  1
  Ge  Ge4  4  0.0211  0.7500  0.8069  1
  Ge  Ge5  4  0.1925  0.7500  0.4922  1
]