data_[Be1Si1S2N1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
  S  2.5800  1.0000  0.8800
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [4.5883]
_cell_length_b [4.5883]
_cell_length_c [3.1886]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [BeSiS2N]
_chemical_formula_sum '[Be1 Si1 S2 N1]'
_cell_volume [67.1268]
_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
  Si  Si1  1  0.5000  0.5000  0.5000  1
  S  S2  2  0.0000  0.5000  0.0000  1
  N  N3  1  0.0000  0.0000  0.5000  1
]