data_[K6N4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.0273]
_cell_length_b [4.0273]
_cell_length_c [21.1749]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [K3(NO3)2]
_chemical_formula_sum '[K6 N4 O12]'
_cell_volume [343.4386]
_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
[
  K  K0  4  0.0000  0.0000  0.1759  1
  K  K1  2  0.0000  0.0000  0.0000  1
  N  N2  4  0.0000  0.0000  0.3730  1
  O  O3  8  0.0000  0.5000  0.0970  1
  O  O4  4  0.0000  0.0000  0.3155  1
]