data_[Rb16Ca8Ti8O32]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Ti  1.5400  1.4000  0.8517
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Fddd]
_cell_length_a [5.7940]
_cell_length_b [12.5613]
_cell_length_c [22.0534]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [70]
_chemical_formula_structural [Rb2CaTiO4]
_chemical_formula_sum '[Rb16 Ca8 Ti8 O32]'
_cell_volume [1605.0391]
_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  16  0.0000  0.0000  0.1864  1
  Ca  Ca1  8  0.0000  0.0000  0.0000  1
  Ti  Ti2  8  0.0000  0.0000  0.5000  1
  O  O3  32  0.0435  0.1641  0.7091  1
]