data_[Rb2Ga2Se4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ga  1.8100  1.3000  0.7600
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.1785]
_cell_length_b [5.3887]
_cell_length_c [8.1078]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.3650]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbGa(SeO4)2]
_chemical_formula_sum '[Rb2 Ga2 Se4 O16]'
_cell_volume [355.1186]
_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  0.0000  0.0000  0.5000  1
  Ga  Ga1  2  0.0000  0.0000  0.0000  1
  Se  Se2  4  0.1222  0.5000  0.8051  1
  O  O3  8  0.0005  0.2506  0.1817  1
  O  O4  4  0.1880  0.5000  0.6215  1
  O  O5  4  0.2399  0.0000  0.0258  1
]