data_[Na2Nd2Si2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Nd  1.1400  1.8500  1.2765
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.0004]
_cell_length_b [5.5443]
_cell_length_c [6.9488]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.6357]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaNdSiO4]
_chemical_formula_sum '[Na2 Nd2 Si2 O8]'
_cell_volume [230.7089]
_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
[
  Na  Na0  2  0.4192  0.2500  0.8574  1.0
  Nd  Nd1  2  0.1953  0.2500  0.4140  1.0
  Si  Si2  2  0.3140  0.7500  0.6588  1.0
  O  O3  4  0.1458  0.5159  0.6779  1.0
  O  O4  2  0.4104  0.7500  0.4417  1.0
  O  O5  2  0.4705  0.2500  0.1835  1.0
]