data_[Li18Ca6Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Ca  1.0000  1.8000  1.1400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.6918]
_cell_length_b [10.4411]
_cell_length_c [13.2785]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Li9Ca3Ag2]
_chemical_formula_sum '[Li18 Ca6 Ag4]'
_cell_volume [650.4752]
_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
[
  Li  Li0  8  0.0000  0.2761  0.1173  1
  Li  Li1  8  0.0000  0.3553  0.3258  1
  Li  Li2  2  0.0000  0.5000  0.0000  1
  Ca  Ca3  4  0.0000  0.0000  0.3225  1
  Ca  Ca4  2  0.0000  0.0000  0.0000  1
  Ag  Ag5  4  0.0000  0.2146  0.5000  1
]