data_[Er4Tm4O4]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.8331]
_cell_length_b [6.4712]
_cell_length_c [6.7044]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.0064]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [ErTmO]
_chemical_formula_sum '[Er4 Tm4 O4]'
_cell_volume [272.8780]
_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  4  0.3908  0.6643  0.6255  1
  Tm  Tm1  4  0.1133  0.1720  0.3756  1
  O  O2  4  0.3999  0.1697  0.0786  1
]