data_[Na2Ni4As2H4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ni  1.9100  1.3500  0.7400
  As  2.1800  1.1500  0.6600
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [4.1976]
_cell_length_b [4.9729]
_cell_length_c [7.4452]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.7719]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaNi2AsH2]
_chemical_formula_sum '[Na2 Ni4 As2 H4]'
_cell_volume [154.3300]
_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  0.2703  0.7500  0.6128  1.0
  Ni  Ni1  4  0.1919  0.5093  0.1622  1.0
  As  As2  2  0.3177  0.2500  0.9109  1.0
  H  H3  2  0.2013  0.7500  0.3144  1.0
  H  H4  2  0.2047  0.2500  0.2992  1.0
]