data_[Ho6Mg3Sn3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ho  1.2300  1.7500  1.0410
  Mg  1.3100  1.5000  0.8600
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.5639]
_cell_length_b [5.5639]
_cell_length_c [14.4447]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Ho2MgSnO6]
_chemical_formula_sum '[Ho6 Mg3 Sn3 O18]'
_cell_volume [387.2504]
_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
[
  Ho  Ho0  3  0.0000  0.0000  0.0306  1.0
  Ho  Ho1  3  0.0000  0.0000  0.5303  1.0
  Mg  Mg2  3  0.0000  0.0000  0.8105  1.0
  Sn  Sn3  3  0.0000  0.0000  0.3148  1.0
  O  O4  9  0.0190  0.3913  0.5797  1.0
  O  O5  9  0.0267  0.6340  0.0790  1.0
]