data_[Rb2Ga2Si2O8]
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
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.3243]
_cell_length_b [5.4201]
_cell_length_c [8.5886]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.2070]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbGaSiO4]
_chemical_formula_sum '[Rb2 Ga2 Si2 O8]'
_cell_volume [247.6662]
_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  0.2434  0.2500  0.0011  1.0
  Ga  Ga1  2  0.1338  0.2500  0.5183  1.0
  Si  Si2  2  0.2942  0.7500  0.2944  1.0
  O  O3  4  0.1234  0.5225  0.3761  1.0
  O  O4  2  0.2623  0.7500  0.1094  1.0
  O  O5  2  0.4122  0.2500  0.6469  1.0
]