data_[Na2Y2Ti4Si4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Y  1.2200  1.8000  1.0400
  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 [C2]
_cell_length_a [6.6998]
_cell_length_b [8.7157]
_cell_length_c [7.1335]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.2784]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [NaYTi2(SiO5)2]
_chemical_formula_sum '[Na2 Y2 Ti4 Si4 O20]'
_cell_volume [379.7057]
_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  0.0000  0.8287  0.5000  1.0
  Y  Y1  2  0.0000  0.1737  0.0000  1.0
  Ti  Ti2  4  0.0067  0.5018  0.2553  1.0
  Si  Si3  2  0.0000  0.1776  0.5000  1.0
  Si  Si4  2  0.0000  0.8216  0.0000  1.0
  O  O5  4  0.0773  0.2804  0.3461  1.0
  O  O6  4  0.1158  0.7104  0.8845  1.0
  O  O7  4  0.1785  0.9448  0.1569  1.0
  O  O8  4  0.1943  0.0655  0.6556  1.0
  O  O9  2  0.0000  0.4272  0.0000  1.0
  O  O10  2  0.0000  0.5654  0.5000  1.0
]