data_[K2Mg2Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [9.8765]
_cell_length_b [3.1945]
_cell_length_c [6.8133]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.5505]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [KMgAg2]
_chemical_formula_sum '[K2 Mg2 Ag4]'
_cell_volume [213.0983]
_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  0.4933  0.0000  0.4786  1
  Mg  Mg1  2  0.2732  0.0000  0.8567  1
  Ag  Ag2  2  0.0033  0.0000  0.9883  1
  Ag  Ag3  2  0.2302  0.5000  0.1763  1
]