data_[Pm6Hg6F18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Hg  2.0000  1.5000  1.2450
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.3924]
_cell_length_b [6.3924]
_cell_length_c [22.1905]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [PmHgF3]
_chemical_formula_sum '[Pm6 Hg6 F18]'
_cell_volume [785.2770]
_cell_formula_units_Z [6]
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  6  0.0000  0.0000  0.1812  1
  Hg  Hg1  6  0.0000  0.0000  0.3416  1
  F  F2  18  0.0312  0.6290  0.5491  1
]