data_[Na4Si2H12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [P4_2/mnm]
_cell_length_a [4.6693]
_cell_length_b [4.6693]
_cell_length_c [9.3559]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [136]
_chemical_formula_structural [Na2SiH6]
_chemical_formula_sum '[Na4 Si2 H12]'
_cell_volume [203.9773]
_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  0.0000  0.0000  0.3344  1.0
  Si  Si1  2  0.0000  0.0000  0.0000  1.0
  H  H2  8  0.1706  0.8294  0.1238  1.0
  H  H3  4  0.2421  0.2421  0.0000  1.0
]