data_[Pm4Sn2Se10]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pbam]
_cell_length_a [8.2275]
_cell_length_b [12.1457]
_cell_length_c [4.0746]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [55]
_chemical_formula_structural [Pm2SnSe5]
_chemical_formula_sum '[Pm4 Sn2 Se10]'
_cell_volume [407.1728]
_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  0.0309  0.3263  0.5000  1
  Sn  Sn1  2  0.0000  0.0000  0.0000  1
  Se  Se2  4  0.1717  0.0973  0.5000  1
  Se  Se3  4  0.1774  0.8043  0.0000  1
  Se  Se4  2  0.0000  0.5000  0.0000  1
]