data_[Al2Si2Br4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [3.5854]
_cell_length_b [6.1208]
_cell_length_c [8.9226]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [AlSiBr2]
_chemical_formula_sum '[Al2 Si2 Br4]'
_cell_volume [195.8107]
_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
[
  Al  Al0  2  0.0000  0.5000  0.0000  1
  Si  Si1  2  0.0000  0.5000  0.5000  1
  Br  Br2  4  0.0000  0.0000  0.2585  1
]