data_[Na8Si4H16]
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 [Fmm2]
_cell_length_a [6.5817]
_cell_length_b [8.5316]
_cell_length_c [6.9680]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [42]
_chemical_formula_structural [Na2SiH4]
_chemical_formula_sum '[Na8 Si4 H16]'
_cell_volume [391.2670]
_cell_formula_units_Z [4]
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  8  0.2500  0.2500  0.2804  1.0
  Si  Si1  4  0.0000  0.0000  0.0576  1.0
  H  H2  8  0.0000  0.2188  0.0230  1.0
  H  H3  8  0.1792  0.0000  0.9177  1.0
]