data_[Er8Tm20]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [15.3289]
_cell_length_b [6.1514]
_cell_length_c [8.9971]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.2611]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Er2Tm5]
_chemical_formula_sum '[Er8 Tm20]'
_cell_volume [843.3119]
_cell_formula_units_Z [4]
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  8  0.0716  0.3330  0.6072  1
  Tm  Tm1  8  0.1431  0.1664  0.9643  1
  Tm  Tm2  8  0.2143  0.3334  0.3215  1
  Tm  Tm3  4  0.0000  0.1667  0.2500  1
]