data_[Na2Cr4H16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cr  1.6600  1.4000  0.9400
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.8322]
_cell_length_b [7.7831]
_cell_length_c [4.2254]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Na(CrH4)2]
_chemical_formula_sum '[Na2 Cr4 H16]'
_cell_volume [158.9168]
_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  0.0000  0.0044  1
  Cr  Cr1  4  0.5000  0.1803  0.5285  1
  H  H2  8  0.2411  0.2324  0.2719  1
  H  H3  4  0.2848  0.0000  0.5060  1
  H  H4  4  0.5000  0.1123  0.9393  1
]