data_[Mg1Fe2H8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Fe  1.8300  1.4000  0.8525
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [3.7463]
_cell_length_b [3.7463]
_cell_length_c [5.3964]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Mg(FeH4)2]
_chemical_formula_sum '[Mg1 Fe2 H8]'
_cell_volume [65.5903]
_cell_formula_units_Z [1]
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
[
  Mg  Mg0  1  0.0000  0.0000  0.0000  1
  Fe  Fe1  2  0.3333  0.6667  0.3866  1
  H  H2  6  0.1729  0.3458  0.6409  1
  H  H3  2  0.3333  0.6667  0.0897  1
]