data_[Pm12Sn2Te6Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Sn  1.9600  1.4500  0.8300
  Te  2.1000  1.4000  1.2933
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [19.6896]
_cell_length_b [4.5159]
_cell_length_c [9.0268]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.6671]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm6SnTe3Pb2]
_chemical_formula_sum '[Pm12 Sn2 Te6 Pb4]'
_cell_volume [779.9072]
_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  0.0010  0.0000  0.2431  1
  Pm  Pm1  4  0.1641  0.5000  0.0857  1
  Pm  Pm2  4  0.1677  0.5000  0.5798  1
  Sn  Sn3  2  0.0000  0.5000  0.0000  1
  Te  Te4  4  0.1670  0.0000  0.8335  1
  Te  Te5  2  0.0000  0.5000  0.5000  1
  Pb  Pb6  4  0.1666  0.0000  0.3332  1
]