data_[Si2As2N2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  As  2.1800  1.1500  0.6600
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [6.9400]
_cell_length_b [5.5372]
_cell_length_c [3.1057]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.0218]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [SiAsNO2]
_chemical_formula_sum '[Si2 As2 N2 O4]'
_cell_volume [119.2739]
_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
[
  Si  Si0  2  0.1122  0.5000  0.4336  1
  As  As1  2  0.0014  0.0000  0.9991  1
  N  N2  2  0.2315  0.5000  0.9426  1
  O  O3  4  0.4696  0.2397  0.4261  1
]