data_[Pm12Si8Ge12]
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 [Cmcm]
_cell_length_a [4.0867]
_cell_length_b [11.0411]
_cell_length_c [16.0345]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Pm3Si2Ge3]
_chemical_formula_sum '[Pm12 Si8 Ge12]'
_cell_volume [723.5017]
_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  0.0000  0.1334  0.5887  1
  Pm  Pm1  4  0.0000  0.4177  0.7500  1
  Si  Si2  8  0.0000  0.1640  0.1273  1
  Ge  Ge3  8  0.0000  0.4164  0.5571  1
  Ge  Ge4  4  0.0000  0.3086  0.2500  1
]