data_[Pm2Sm8Se10]
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
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.8773]
_cell_length_b [4.1757]
_cell_length_c [10.2339]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.6473]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [PmSm4Se5]
_chemical_formula_sum '[Pm2 Sm8 Se10]'
_cell_volume [515.3931]
_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  0.0000  0.0000  1
  Sm  Sm1  4  0.0996  0.5000  0.3993  1
  Sm  Sm2  4  0.2006  0.0000  0.7998  1
  Se  Se3  4  0.1009  0.5000  0.8994  1
  Se  Se4  4  0.2005  0.0000  0.3013  1
  Se  Se5  2  0.0000  0.0000  0.5000  1
]