data_[Pm18Ho8Hg22]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ho  1.2300  1.7500  1.0410
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [15.8216]
_cell_length_b [23.2761]
_cell_length_c [3.5706]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Pm9Ho4Hg11]
_chemical_formula_sum '[Pm18 Ho8 Hg22]'
_cell_volume [1314.9177]
_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  8  0.1128  0.2560  0.5000  1
  Pm  Pm1  8  0.1247  0.0821  0.5000  1
  Pm  Pm2  2  0.0000  0.5000  0.5000  1
  Ho  Ho3  8  0.1517  0.4045  0.5000  1
  Hg  Hg4  8  0.2382  0.1775  0.0000  1
  Hg  Hg5  4  0.0000  0.1654  0.0000  1
  Hg  Hg6  4  0.0000  0.3628  0.0000  1
  Hg  Hg7  4  0.2310  0.5000  0.0000  1
  Hg  Hg8  2  0.0000  0.0000  0.0000  1
]