data_[Sr2Al2Si2Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.1996]
_cell_length_b [4.4124]
_cell_length_c [11.7257]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [SrAlSiAg2]
_chemical_formula_sum '[Sr2 Al2 Si2 Ag4]'
_cell_volume [217.2815]
_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
[
  Sr  Sr0  2  0.0000  0.0000  0.4357  1.0
  Al  Al1  2  0.0000  0.5000  0.1956  1.0
  Si  Si2  2  0.0000  0.0000  0.8261  1.0
  Ag  Ag3  2  0.0000  0.0000  0.0462  1.0
  Ag  Ag4  2  0.0000  0.5000  0.7085  1.0
]