data_[Pm6Sm2Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sm  1.1700  1.8500  1.2290
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [5.2522]
_cell_length_b [9.5425]
_cell_length_c [7.1797]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Pm3SmHg2]
_chemical_formula_sum '[Pm6 Sm2 Hg4]'
_cell_volume [359.8417]
_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  2  0.0000  0.0558  0.4866  1
  Pm  Pm1  2  0.0000  0.3272  0.8274  1
  Pm  Pm2  2  0.5000  0.1739  0.1722  1
  Sm  Sm3  2  0.5000  0.4442  0.5135  1
  Hg  Hg4  2  0.0000  0.3507  0.2656  1
  Hg  Hg5  2  0.5000  0.1500  0.7346  1
]