data_[K3Sr3N9O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [7.9415]
_cell_length_b [7.9415]
_cell_length_c [10.7237]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [KSr(NO2)3]
_chemical_formula_sum '[K3 Sr3 N9 O18]'
_cell_volume [585.7000]
_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
[
  K  K0  3  0.0000  0.0000  0.4793  1.0
  Sr  Sr1  3  0.0000  0.0000  0.0229  1.0
  N  N2  9  0.1519  0.3850  0.8695  1.0
  O  O3  9  0.0885  0.4006  0.5241  1.0
  O  O4  9  0.1281  0.7550  0.9625  1.0
]