data_[Rb4Sr8Ga4Se16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sr  0.9500  2.0000  1.3200
  Ga  1.8100  1.3000  0.7600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.9365]
_cell_length_b [9.1143]
_cell_length_c [12.4516]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [RbSr2GaSe4]
_chemical_formula_sum '[Rb4 Sr8 Ga4 Se16]'
_cell_volume [1014.1804]
_cell_formula_units_Z [4]
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  4  0.2500  0.2500  0.7500  1
  Sr  Sr1  4  0.0000  0.0000  0.5000  1
  Sr  Sr2  4  0.2500  0.2500  0.2500  1
  Ga  Ga3  4  0.0000  0.0000  0.0000  1
  Se  Se4  8  0.0000  0.0151  0.1919  1
  Se  Se5  8  0.2336  0.2500  0.4912  1
]