data_[K4Ce2Nb10O30]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ce  1.1200  1.8500  1.0800
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [12.8186]
_cell_length_b [12.8186]
_cell_length_c [3.9871]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [K2CeNb5O15]
_chemical_formula_sum '[K4 Ce2 Nb10 O30]'
_cell_volume [655.1426]
_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  0.1699  0.3301  0.0000  1
  Ce  Ce1  2  0.0000  0.0000  0.0000  1
  Nb  Nb2  8  0.0766  0.7870  0.5000  1
  Nb  Nb3  2  0.0000  0.5000  0.5000  1
  O  O4  8  0.0018  0.3421  0.5000  1
  O  O5  8  0.0600  0.1307  0.5000  1
  O  O6  8  0.0767  0.8100  0.0000  1
  O  O7  4  0.2168  0.7168  0.5000  1
  O  O8  2  0.0000  0.5000  0.0000  1
]