data_[Ca2H4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [3.8011]
_cell_length_b [3.8011]
_cell_length_c [5.3461]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [CaH2]
_chemical_formula_sum '[Ca2 H4]'
_cell_volume [66.8946]
_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
[
  Ca  Ca0  2  0.3333  0.6667  0.7500  1
  H  H1  2  0.0000  0.0000  0.0000  1
  H  H2  2  0.3333  0.6667  0.2500  1
]