data_[Tm12Hg4Pb2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tm  1.2500  1.7500  1.0950
  Hg  2.0000  1.5000  1.2450
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [18.8928]
_cell_length_b [3.9238]
_cell_length_c [8.8368]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.1272]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Tm6Hg2PbSe3]
_chemical_formula_sum '[Tm12 Hg4 Pb2 Se6]'
_cell_volume [611.0607]
_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
[
  Tm  Tm0  4  0.0054  0.0000  0.2676  1.0
  Tm  Tm1  4  0.1586  0.5000  0.6188  1.0
  Tm  Tm2  4  0.1751  0.5000  0.1033  1.0
  Hg  Hg3  4  0.1817  0.0000  0.3778  1.0
  Pb  Pb4  2  0.0000  0.5000  0.0000  1.0
  Se  Se5  4  0.1615  0.0000  0.8545  1.0
  Se  Se6  2  0.0000  0.5000  0.5000  1.0
]