data_[Rb3Sr3N9O18]
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
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [8.0569]
_cell_length_b [8.0569]
_cell_length_c [10.5214]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [RbSr(NO2)3]
_chemical_formula_sum '[Rb3 Sr3 N9 O18]'
_cell_volume [591.4841]
_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  3  0.0000  0.0000  0.5080  1.0
  Sr  Sr1  3  0.0000  0.0000  0.0199  1.0
  N  N2  9  0.1709  0.3861  0.8681  1.0
  O  O3  9  0.0019  0.2480  0.8485  1.0
  O  O4  9  0.1122  0.7439  0.9643  1.0
]