data_[Rb2Sm2Si2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sm  1.1700  1.8500  1.2290
  Si  1.9000  1.1000  0.5400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.7660]
_cell_length_b [7.0087]
_cell_length_c [9.4943]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.0093]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbSmSiSe4]
_chemical_formula_sum '[Rb2 Sm2 Si2 Se8]'
_cell_volume [428.1662]
_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
[
  Rb  Rb0  2  0.2605  0.2500  0.0627  1.0
  Sm  Sm1  2  0.2293  0.2500  0.5498  1.0
  Si  Si2  2  0.2170  0.7500  0.3291  1.0
  Se  Se3  4  0.0082  0.5043  0.7098  1.0
  Se  Se4  2  0.4129  0.7500  0.1738  1.0
  Se  Se5  2  0.4171  0.7500  0.5712  1.0
]