data_[Rb2Sn2Se3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pm]
_cell_length_a [4.0197]
_cell_length_b [21.9912]
_cell_length_c [6.4739]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.8219]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [6]
_chemical_formula_structural [Rb2Sn2Se3]
_chemical_formula_sum '[Rb2 Sn2 Se3]'
_cell_volume [550.6029]
_cell_formula_units_Z [1]
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  0.4533  0.3458  0.4116  1
  Sn  Sn1  2  0.6821  0.4307  0.9105  1
  Se  Se2  2  0.1582  0.3410  0.8706  1
  Se  Se3  1  0.3001  0.5000  0.1960  1
]