data_[Ce1Nb1Si2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Nb  1.6000  1.4500  0.8200
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [5.2966]
_cell_length_b [5.2966]
_cell_length_c [6.7180]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [CeNb(SiO4)2]
_chemical_formula_sum '[Ce1 Nb1 Si2 O8]'
_cell_volume [163.2170]
_cell_formula_units_Z [1]
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
[
  Ce  Ce0  1  0.0000  0.0000  0.5000  1
  Nb  Nb1  1  0.0000  0.0000  0.0000  1
  Si  Si2  2  0.3333  0.6667  0.7203  1
  O  O3  6  0.1664  0.3327  0.8101  1
  O  O4  2  0.3333  0.6667  0.4826  1
]