data_[Er1Tm1Ni1Ag1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
  Ni  1.9100  1.3500  0.7400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.4298]
_cell_length_b [3.4298]
_cell_length_c [7.1300]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [ErTmNiAg]
_chemical_formula_sum '[Er1 Tm1 Ni1 Ag1]'
_cell_volume [83.8751]
_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
[
  Er  Er0  1  0.0000  0.0000  0.8335  1
  Tm  Tm1  1  0.0000  0.0000  0.3802  1
  Ni  Ni2  1  0.5000  0.5000  0.6051  1
  Ag  Ag3  1  0.5000  0.5000  0.1092  1
]