data_[Mg2Al4As4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Al  1.6100  1.2500  0.6750
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [7.2634]
_cell_length_b [7.2634]
_cell_length_c [3.6146]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [Mg(AlAs)2]
_chemical_formula_sum '[Mg2 Al4 As4]'
_cell_volume [190.6923]
_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
[
  Mg  Mg0  2  0.0000  0.0000  0.0000  1
  Al  Al1  4  0.1370  0.6370  0.5000  1
  As  As2  4  0.1684  0.3316  0.0000  1
]