data_[Ba2Si2As2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Si  1.9000  1.1000  0.5400
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [4.4130]
_cell_length_b [4.7779]
_cell_length_c [8.3792]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [BaSiAs]
_chemical_formula_sum '[Ba2 Si2 As2]'
_cell_volume [176.6732]
_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
[
  Ba  Ba0  2  0.2500  0.5000  0.7592  1
  Si  Si1  2  0.2500  0.0000  0.4328  1
  As  As2  2  0.2500  0.0000  0.1517  1
]