data_[Er6Mg3Ge3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Mg  1.3100  1.5000  0.8600
  Ge  2.0100  1.2500  0.7700
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.4165]
_cell_length_b [5.4165]
_cell_length_c [13.6444]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Er2MgGeO6]
_chemical_formula_sum '[Er6 Mg3 Ge3 O18]'
_cell_volume [346.6727]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.0379  1.0
  Er  Er1  3  0.0000  0.0000  0.5382  1.0
  Mg  Mg2  3  0.0000  0.0000  0.8110  1.0
  Ge  Ge3  3  0.0000  0.0000  0.3165  1.0
  O  O4  9  0.0303  0.6183  0.0738  1.0
  O  O5  9  0.0692  0.3352  0.9122  1.0
]