data_[Pm8Er4Os4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Os  2.2000  1.3000  0.6730
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [7.4392]
_cell_length_b [9.3666]
_cell_length_c [6.4218]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Pm2ErOs]
_chemical_formula_sum '[Pm8 Er4 Os4]'
_cell_volume [447.4729]
_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  0.1758  0.0638  0.3287  1
  Er  Er1  4  0.0427  0.2500  0.8610  1
  Os  Os2  4  0.1164  0.7500  0.5336  1
]