data_[Rb2Be2Bi2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Be  1.5700  1.0500  0.5900
  Bi  2.0200  1.6000  1.0350
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [9.6358]
_cell_length_b [4.0731]
_cell_length_c [9.9538]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.2738]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbBeBiSe3]
_chemical_formula_sum '[Rb2 Be2 Bi2 Se6]'
_cell_volume [370.9665]
_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  0.2298  0.2500  0.1891  1.0
  Be  Be1  2  0.4009  0.7500  0.9248  1.0
  Bi  Bi2  2  0.1415  0.2500  0.6614  1.0
  Se  Se3  2  0.1578  0.7500  0.8765  1.0
  Se  Se4  2  0.1637  0.7500  0.4492  1.0
  Se  Se5  2  0.4784  0.2500  0.8409  1.0
]