data_[Pm12Mg4Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.2024]
_cell_length_b [4.3965]
_cell_length_c [11.1507]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.8819]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3MgGe2]
_chemical_formula_sum '[Pm12 Mg4 Ge8]'
_cell_volume [708.4705]
_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  0.0500  0.0000  0.2393  1
  Pm  Pm1  4  0.1415  0.5000  0.0035  1
  Pm  Pm2  4  0.2257  0.0000  0.6271  1
  Mg  Mg3  4  0.0720  0.5000  0.6582  1
  Ge  Ge4  4  0.1188  0.5000  0.4454  1
  Ge  Ge5  4  0.1491  0.0000  0.8278  1
]