data_[Pm12Sm2Hg4]
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 [C2/m]
_cell_length_a [12.8983]
_cell_length_b [3.8087]
_cell_length_c [12.1923]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.6992]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm6SmHg2]
_chemical_formula_sum '[Pm12 Sm2 Hg4]'
_cell_volume [567.3354]
_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  4  0.0196  0.0000  0.3381  1
  Pm  Pm1  4  0.1872  0.5000  0.8755  1
  Pm  Pm2  4  0.1899  0.5000  0.5882  1
  Sm  Sm3  2  0.0000  0.0000  0.0000  1
  Hg  Hg4  4  0.1415  0.5000  0.2025  1
]