data_[Pm4Si6Ge4]
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 [Cmmm]
_cell_length_a [4.3222]
_cell_length_b [17.4481]
_cell_length_c [3.9892]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Pm2Si3Ge2]
_chemical_formula_sum '[Pm4 Si6 Ge4]'
_cell_volume [300.8413]
_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  0.1462  0.5000  1
  Si  Si1  4  0.0000  0.2798  0.0000  1
  Si  Si2  2  0.0000  0.0000  0.0000  1
  Ge  Ge3  4  0.0000  0.4194  0.0000  1
]