data_[Sr3Er1Ag4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Er  1.2400  1.7500  1.0300
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.8096]
_cell_length_b [3.8096]
_cell_length_c [15.6603]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Sr3ErAg4]
_chemical_formula_sum '[Sr3 Er1 Ag4]'
_cell_volume [227.2818]
_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
[
  Sr  Sr0  2  0.5000  0.5000  0.2405  1
  Sr  Sr1  1  0.5000  0.5000  0.5000  1
  Er  Er2  1  0.5000  0.5000  0.0000  1
  Ag  Ag3  2  0.0000  0.0000  0.0994  1
  Ag  Ag4  2  0.0000  0.0000  0.3709  1
]