data_[Th2Nb2Si4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Th  1.3000  1.8000  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 [C2]
_cell_length_a [7.0315]
_cell_length_b [8.4438]
_cell_length_c [5.0190]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.4222]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [ThNbSi2O7]
_chemical_formula_sum '[Th2 Nb2 Si4 O14]'
_cell_volume [295.4970]
_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
[
  Th  Th0  2  0.0000  0.6845  0.5000  1
  Nb  Nb1  2  0.0000  0.3354  0.5000  1
  Si  Si2  4  0.2129  0.9948  0.9136  1
  O  O3  4  0.1386  0.4964  0.8069  1
  O  O4  4  0.2206  0.1592  0.7426  1
  O  O5  4  0.2423  0.3441  0.2810  1
  O  O6  2  0.0000  0.9518  0.0000  1
]