data_[Rb2Gd2Se2O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Gd  1.2000  1.8000  1.0750
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.6157]
_cell_length_b [8.4916]
_cell_length_c [6.7784]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [RbGdSeO]
_chemical_formula_sum '[Rb2 Gd2 Se2 O2]'
_cell_volume [265.6797]
_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  0.5000  0.3011  0.1103  1
  Gd  Gd1  2  0.0000  0.1187  0.5376  1
  Se  Se2  2  0.5000  0.2943  0.6176  1
  O  O3  2  0.0000  0.0818  0.2255  1
]