data_[Rb4Sr4Sb4O16]
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
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [6.6267]
_cell_length_b [7.6325]
_cell_length_c [10.0569]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [RbSrSbO4]
_chemical_formula_sum '[Rb4 Sr4 Sb4 O16]'
_cell_volume [508.6580]
_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  0.0000  1
  Sb  Sb2  4  0.0000  0.2500  0.3621  1
  O  O3  8  0.0000  0.0438  0.2549  1
  O  O4  8  0.2360  0.2500  0.4764  1
]