data_[K4Al2Ag6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Al  1.6100  1.2500  0.6750
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [5.6533]
_cell_length_b [6.6142]
_cell_length_c [8.9160]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [K2AlAg3]
_chemical_formula_sum '[K4 Al2 Ag6]'
_cell_volume [333.3867]
_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
[
  K  K0  2  0.2500  0.0000  0.3789  1.0
  K  K1  2  0.2500  0.5000  0.1425  1.0
  Al  Al2  2  0.2500  0.5000  0.5682  1.0
  Ag  Ag3  4  0.2500  0.2201  0.7722  1.0
  Ag  Ag4  2  0.0000  0.0000  0.0000  1.0
]