data_[Be1As2Se1Cl1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [4.6775]
_cell_length_b [4.6775]
_cell_length_c [4.4331]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [BeAs2SeCl]
_chemical_formula_sum '[Be1 As2 Se1 Cl1]'
_cell_volume [96.9899]
_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
[
  Be  Be0  1  0.0000  0.0000  0.0000  1
  As  As1  2  0.0000  0.5000  0.0000  1
  Se  Se2  1  0.0000  0.0000  0.5000  1
  Cl  Cl3  1  0.5000  0.5000  0.5000  1
]