data_[Rb4Na2N6O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [5.1973]
_cell_length_b [8.6708]
_cell_length_c [9.3738]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Rb2Na(NO3)3]
_chemical_formula_sum '[Rb4 Na2 N6 O18]'
_cell_volume [422.4319]
_cell_formula_units_Z [2]
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  2  0.5000  0.0812  0.3321  1
  Rb  Rb1  2  0.5000  0.3797  0.6609  1
  Na  Na2  2  0.0000  0.3016  0.1203  1
  N  N3  2  0.0000  0.0541  0.6291  1
  N  N4  2  0.0000  0.4113  0.4160  1
  N  N5  2  0.5000  0.2502  0.9799  1
  O  O6  4  0.2110  0.3904  0.3515  1
  O  O7  4  0.2115  0.1095  0.5885  1
  O  O8  4  0.2878  0.2260  0.9172  1
  O  O9  2  0.0000  0.0613  0.2139  1
  O  O10  2  0.0000  0.4524  0.5459  1
  O  O11  2  0.5000  0.2991  0.1077  1
]