data_[Rb36Zn3O21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Zn  1.6500  1.3500  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [14.3384]
_cell_length_b [14.3384]
_cell_length_c [10.1387]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Rb12ZnO7]
_chemical_formula_sum '[Rb36 Zn3 O21]'
_cell_volume [1805.1466]
_cell_formula_units_Z [3]
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  18  0.0402  0.5807  0.6554  1
  Rb  Rb1  18  0.0403  0.1561  0.3112  1
  Zn  Zn2  3  0.0000  0.0000  0.0000  1
  O  O3  18  0.0385  0.1651  0.8533  1
  O  O4  3  0.0000  0.0000  0.5000  1
]