data_[Hf2Be2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Hf  1.3000  1.5500  0.8500
  Be  1.5700  1.0500  0.5900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [18.4255]
_cell_length_b [3.5008]
_cell_length_c [12.0982]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [HfBeSe3]
_chemical_formula_sum '[Hf2 Be2 Se6]'
_cell_volume [780.3701]
_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
[
  Hf  Hf0  2  0.5000  0.0000  0.4369  1
  Be  Be1  2  0.5000  0.0000  0.7294  1
  Se  Se2  4  0.4070  0.0000  0.8452  1
  Se  Se3  2  0.5000  0.0000  0.1101  1
]