data_[Rb8Sr8]
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
]
_symmetry_space_group_name_H-M [I-43m]
_cell_length_a [13.6140]
_cell_length_b [13.6140]
_cell_length_c [13.6140]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [217]
_chemical_formula_structural [RbSr]
_chemical_formula_sum '[Rb8 Sr8]'
_cell_volume [2523.2546]
_cell_formula_units_Z [8]
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  8  0.2046  0.2046  0.2046  1
  Sr  Sr1  8  0.1062  0.8938  0.1062  1
]