data_[K1Ca1Ag2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ca  1.0000  1.8000  1.1400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Pmmm]
_cell_length_a [3.8055]
_cell_length_b [4.0995]
_cell_length_c [7.9109]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [47]
_chemical_formula_structural [KCaAg2]
_chemical_formula_sum '[K1 Ca1 Ag2]'
_cell_volume [123.4119]
_cell_formula_units_Z [1]
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  1  0.5000  0.5000  0.0000  1.0
  Ca  Ca1  1  0.5000  0.5000  0.5000  1.0
  Ag  Ag2  2  0.0000  0.0000  0.3100  1.0
]