data_[Pm8Tl8Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.6611]
_cell_length_b [4.8558]
_cell_length_c [11.2950]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.6741]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm2Tl2Hg]
_chemical_formula_sum '[Pm8 Tl8 Hg4]'
_cell_volume [576.4229]
_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  0.0194  0.0000  0.3288  1
  Pm  Pm1  4  0.1772  0.0000  0.0951  1
  Tl  Tl2  4  0.0393  0.5000  0.8854  1
  Tl  Tl3  4  0.1457  0.5000  0.5468  1
  Hg  Hg4  4  0.2323  0.5000  0.3053  1
]