data_[Rb4Sn4As4O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.5791]
_cell_length_b [5.0762]
_cell_length_c [7.9996]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.2948]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Sn2As2O]
_chemical_formula_sum '[Rb4 Sn4 As4 O2]'
_cell_volume [426.9628]
_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  4  0.0511  0.5000  0.3032  1.0
  Sn  Sn1  4  0.1913  0.0000  0.0852  1.0
  As  As2  4  0.2020  0.0000  0.7528  1.0
  O  O3  2  0.0000  0.0000  0.0000  1.0
]