data_[Rb8Ni4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ni  1.9100  1.3500  0.7400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [10.2784]
_cell_length_b [7.2325]
_cell_length_c [5.2981]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Rb2NiO3]
_chemical_formula_sum '[Rb8 Ni4 O12]'
_cell_volume [393.8549]
_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  8  0.1609  0.3423  0.7500  1
  Ni  Ni1  4  0.0000  0.0822  0.2500  1
  O  O2  8  0.1219  0.0000  0.0000  1
  O  O3  4  0.0000  0.3254  0.2500  1
]