data_[Na4Ti2Si2O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ti  1.5400  1.4000  0.8517
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [6.5298]
_cell_length_b [6.5298]
_cell_length_c [5.1698]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [Na2TiSiO5]
_chemical_formula_sum '[Na4 Ti2 Si2 O10]'
_cell_volume [220.4324]
_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  4  0.2500  0.2500  0.5000  1.0
  Ti  Ti1  2  0.0000  0.5000  0.9363  1.0
  Si  Si2  2  0.0000  0.0000  0.0000  1.0
  O  O3  8  0.0000  0.2073  0.8176  1.0
  O  O4  2  0.0000  0.5000  0.2690  1.0
]